Unit/Upgrading

Besides the Rank, units can be upgraded in two major directions: level and tier.
This will not only improve the stats of the unit, but also unlock skills and improve Roster score.
While you can read each component of upgrading a unit in detail below, here is the upgrade sequence:
* Player Level must first be increased by obtaining Player XP
* Unit Level must then be increased by spending Unit XP
* Unit Equipments can then be leveled up by spending Gold
* At threshold levels, Unit Equipment tier can then be increased by spending various Materials (including Books)
* Unit Tier can be increased by spending Gold
* Finally, unit Transcendence level can also be upgraded by spending Gold and Unit XP
==Level==
Every newly recruited unit starts at level 1, and can be upgraded up to the current Player Level.
This ensures a consistent progress through the game: as the player level progresses, unit level also follows up.
Every other functionality is eventually limited by the unit level. Therefore leveling up a player's units is only the first step.
In order to upgrade a unit, a player must pay a specific amount of Unit XP. It can be paid progressively, but the specific total amount must be fully paid before the unit gets to the next level.
Unit Level	Required	Accumulated
1 	0 	0
2 	10 	10
3 	10 	20
4 	10 	30
5 	10 	40
6 	30 	70
7 	40 	110
8 	80 	190
9 	80 	270
10 	90 	360
11 	120 	480
12 	180 	660
13 	250 	910
14 	400 	1310
15 	600 	1910
16 	800 	2710
17 	850 	3560
18 	900 	4460
19 	1000 	5460
20 	1100 	6560
21 	1200 	7760
22 	1300 	9060
23 	1350 	10410
24 	1400 	11810
25 	1450 	13260
26 	1500 	14760
27 	1600 	16360
28 	1650 	18010
29 	1700 	19710
30 	1750 	21460
31 	1980 	23440
32 	2310 	25750
33 	2640 	28390
34 	2970 	31360
35 	3300 	34660
36 	3630 	38290
37 	4125 	42415
38 	4785 	47200
39 	5445 	52645
40 	6270 	58915
41 	7740 	66655
42 	9000 	75655
43 	10800 	86455
44 	12600 	99055
45 	14400 	113455
46 	17100 	130555
47 	18000 	148555
48 	18900 	167455
49 	19800 	187255
50 	20700 	207955
51 	23400 	231355
52 	24375 	255730
53 	27300 	283030
54 	30225 	313255
55 	33150 	346405
56 	36075 	382480
57 	39000 	421480
58 	42900 	464380
59 	46800 	511180
60 	48750 	559930
61 	50700 	610630
62 	52650 	663280
63 	54600 	717880
64 	58500 	776380
65 	62400 	838780
66 	66300 	905080
67 	70200 	975280
68 	72150 	1047430
69 	74100 	1121530
70 	78000 	1199530
71 	88200 	1287730
72 	92400 	1380130
73 	96600 	1476730
74 	98700 	1575430
75 	100800 	1676230
76 	105000 	1781230
77 	109200 	1890430
78 	113400 	2003830
79 	117600 	2121430
80 	121800 	2243230
81 	166000 	2409230
82 	183000 	2592230
83 	195000 	2787230
84 	211000 	2998230
85 	227000 	3225230
86 	243000 	3468230
87 	259000 	3727230
88 	275000 	4002230
89 	291000 	4293230
90 	307000 	4600230
91 	323000 	4923230
92 	339000 	5262230
93 	355000 	5617230
94 	371000 	5988230
95 	387000 	6375230
96 	403000 	6778230
97 	419000 	7197230
98 	435000 	7632230
99 	451000 	8083230
100 	467000 	8550230
101 	483000 	9033230
102 	499000 	9532230
103 	515000 	10047230
104 	531000 	10578230
105 	550000 	11128230
106 	570000 	11698230
107 	590000 	12288230
108 	610000 	12898230
109 	630000 	13528230
110 	650000 	14178230
Note that leveling up a unit improves its stats.
==Tier==
The tier (also referred to as "color") of a unit is a very significant characteristic.
It will not only increase specific stats of the unit, but also unlocks supplementary skills, enables Awakening or allows activation of supplementary Awakening skills.
All units start at Common (white) tier, and can progress unit to Red.
In order to upgrade the tier of a unit, the player must first upgrade all four equipments of that unit to at least that particular tier. This in turn comes with a minimum unit level restriction. 
For a one-time Gold cost, the tier of the unit may be permanently increased. 
Tier 	Cost 	Accumulated
Common 	N/A 	0
Green 	5000 	5K
Blue 	10000 	15K
Blue +1 	20000 	35K
Blue +2 	40000 	75K
Purple 	60000 	135K
Purple +1	80000 	215K
Purple +2	100000	315K
Purple +3	120000	435K
Orange 	160000	595K
Orange +1	200000	795K
Orange +2	250000	1.045M
Orange +3	300000	1.345M
Orange +4	350000	1.695M
Orange +5	400000	2.095M
Red 	450000	2.545M
Red+1* 	500000	3.045M
*: Tiers beyond Red become available using the Transcendence system (but the unit gear still needs to be at Red before it can be further upgraded).
==Equipment==
Every unit has a total of four equipments. While their name and icons vary, they serve a similar functionality irrespective of the unit.
Like the unit itself, equipments also have an associated level and tier which must be individually upgraded.
* Level - can be enhanced by spending . It is always capped by the unit's level. Therefore, you first need to level up your unit before you may level up its equipments.
* Tier - can be enhanced by spending various Materials ( ) and Books . As tiers increase, higher tier materials and books are required to further upgrade the equipment tier. Starting with Purple, equipment tier also has a minimum level requirement specific for each equipment.
Equipment Level	Cost 	Accumulated
1 	- 	0
2 	400 	400
3 	500 	900
4 	600 	1500
5 	700 	2200
6 	800 	3000
7 	900 	3900
8 	1000 	4900
9 	1100 	6000
10 	1200 	7200
11 	1400 	8600
12 	1600 	10200
13 	1800 	12000
14 	2000 	14000
15 	2300 	16300
16 	2600 	18900
17 	2900 	21800
18 	3100 	24900
19 	3300 	28200
20 	3600 	31800
21 	3900 	35700
22 	4100 	39800
23 	4300 	44100
24 	4500 	48600
25 	4700 	53300
26 	4900 	58200
27 	5100 	63300
28 	5300 	68600
29 	5500 	74100
30 	6000 	80100
31 	6600 	86700
32 	7200 	93900
33 	8300 	102200
34 	8700 	110900
35 	9000 	119900
36 	9400 	129300
37 	9700 	139000
38 	10000 	149000
39 	10400 	159400
40 	12600 	172000
41 	13600 	185600
42 	14700 	200300
43 	15800 	216100
44 	17000 	233100
45 	18000 	251100
46 	19000 	270100
47 	20100 	290200
48 	21200 	311400
49 	22300 	333700
50 	29000 	362700
51 	30600 	393300
52 	32400 	425700
53 	34200 	459900
54 	36000 	495900
55 	37800 	533700
56 	39600 	573300
57 	41400 	614700
58 	43200 	657900
59 	45000 	702900
60 	50400 	753300
61 	53300 	806600
62 	56200 	862800
63 	59100 	921900
64 	62000 	983900
65 	64800 	1048700
66 	67800 	1116500
67 	70600 	1187100
68 	73400 	1260500
69 	76300 	1336800
70 	82800 	1419600
71 	86700 	1506300
72 	90700 	1597000
73 	94600 	1691600
74 	98600 	1790200
75 	102600	1892800
76 	106500	1999300
77 	110500	2109800
78 	114500	2224300
79 	118500	2342800
80 	122500	2465300
81 	167000	2632300
82 	181000	2813300
83 	191000	3004300
84 	209000	3213300
85 	223000	3436300
86 	237000	3673300
87 	251000	3924300
88 	265000	4189300
89 	279000	4468300
90 	293000	4761300
91 	307000	5068300
92 	321000	5389300
93 	335000	5724300
94 	349000	6073300
95 	363000	6436300
96 	377000	6813300
97 	391000	7204300
98 	405000	7609300
99 	419000	8028300
100 	433000	8461300
101 	447000	8908300
102 	461000	9369300
103 	475000	9844300
104 	489000	10333300
105 	503000	10836300
106 	517000	11353300
107 	531000	11884300
108 	545000	12429300
109 	559000	12988300
110 	573000	13561300
111 	587000	14148300
===Equipment Requirements In Depth===
As previously mentioning, increasing an equipment's tier has both a minimum level requirement (starting with Purple tier) and also demands specific materials. This follows a very predictable pattern that we will analyze here in depth. 
Foreword: Don't worry if this part is too complicated for you - it's only for those eager to do some resource planning in advance. We've also already got it all covered in the specific units' pages - just search for the Equipment section.
Minimum Level Requirements
While at first glance random, equipment level requirements follow a rather predictable pattern that is actually associated with the Unit's Role.
Basically each equipment has a specific minimum level for each tier depending on the unit role. You can consult the specific role page for more in-depth data. One obvious matter however is that the fourth equipment has always the highest requirement, which in turn indicates the minimum level required to upgrade the unit to the specific tier.
Tier 	Offense	Defense	Caster	Ranged	Charge
Purple 	37 	36 	34 	35 	34
Purple +1	41 	42 	40 	43 	42
Purple +2	47 	47 	47 	46 	48
Purple +3	54 	55 	56 	55 	54
Orange 	63 	62 	62 	64 	63
Orange +1	72 	70 	71 	70 	69
Orange +2	77 	79 	76 	78 	77
Orange +3	87 	86 	86 	85 	85
Orange +4	94 	93 	95 	93 	94
Orange +5	102 	101 	103 	101 	102
Red 	107 	106 	108 	106 	107
Note that there are some exceptions to this rule. In this case, the units still follow a pattern, just not of their Role but of a different Role. You can find the exceptions in the specific role pages. 
Material Requirements
There are two components essential in understanding material requirements.
First, each individual unit equipment has three materials associated with it. We will refer to them here as the 'primary' (1st), 'secondary' (2nd) and 'ternary' (3rd) material. The type of these materials is fixed for the particular equipment and will not vary as the equipment is upgraded.
For example, Pikeman's Azure Lance demands Ore (1st), Mercury (2nd) and Sulfur (3rd).
Next, tier upgrade costs are very similar for every equipment, being completely predictable for each tier.
For example, to upgrade a material from Purple +3 to Orange, one must always spend 12 Books, 18 Primary Materials, 18 Secondary Materials and 10 Tertiary Materials (of one tier lower than the rest). Combining with the three materials for our Pikeman's Azure Lance we obtain the following cost: 12 18 18 10
Consult the table below for a full list of the costs. All materials require the current tier of the equipment, unless marked with (-1) (case in which it requires one tier lower).
Tier To Upgrade To	Books	Primary	Secondary	Tertiary
Green 	- 	1x 	- 	-
Blue 	- 	3x 	- 	-
Blue +1 	1x 	3x 	- 	-
Blue +2 	2x 	5x 	- 	-
Purple 	3x 	10x 	3x (-1) 	-
Purple +1 	5x 	15x 	5x (-1) 	-
Purple +2 	8x 	10x 	10x 	5x (-1)
Purple +3 	10x 	15x 	15x 	8x (-1)
Orange 	12x 	18x 	18x 	10x (-1)
Orange +1 	15x 	25x 	25x 	12x (-1)
Orange +2 	18x 	30x 	30x 	15x (-1)
Orange +3 	21x 	35x 	35x 	18x (-1)
Orange +4 	24x 	40x 	40x 	25x (-1)
Orange +5 	50x 	80x 	80x 	50x (-1)
Red 	100x 	150x 	150x 	100x (-1)
 
Note: While it is highly likely that there is a more specific pattern on how these materials are defined for units (rather than being purely unit specific), this is still subject to investigation.
=Transcendence=
Starting with Player Level 88 and the unlock of Abyss Den and Eternal Crown the player has the possibility to also upgrade a unit's Transcendence level. Unlike "Peak Level" which goes beyond the maximum Player Level (110), Transcendence Level can be upgraded on units that haven't reached level 110 yet.
Here is how it works:
* First the player must farm "Resplendent Dust" in the Abyss Den - it will be required for upgrading the elements in the Eternal Crown
* Then the player must upgrade the Eternal Crown "Power Star" once - each level increases the Transcendence cap by 5 (which represents the maximum Transcendence level possible for all units)
* Then the player needs to upgrade units' Transcendence level in order to unlock Eternal Crown "Class Crystals"
* After all five "Class Crystals" are upgraded to the next level, the "Power Star" can be upgraded once more and the cycle repeats
Note that due to how the system of requirements works, the player will need to upgrade the transcendence level of units of all 5 classes.
==Requirements==
It is unclear at this point if a unit's Transcendence level can be upgraded beyond its Unit Level (to be determined) or if there are other special requirements in regards to the unit's characteristics.
==Benefits==
Upgrading a unit's Transcendence level improves that unit's basic stats: Unit Attack, Unit Defense and HP.
==Costs==
Being a relatively new functionality, this table is still work in progress. It is not clear what is the maximum Transcendence level for a unit, but it definitely connected to the maximum level of the Eternal Crown.
The same amount of Gold and Unit XP is required to upgrade the Transcendence level of a unit.
Transcendence Level	Cost 	Accumulated
1 	174600	174600
2 	184200	358800
3 	193800	552600
4 	203400	756000
5 	213000	969000
6 	222600	1191600
7 	232200	1423800
8 	241800	1665600
9 	251400	1917000
10 	261000	2178000
11 	270600	2448600
12 	280200	2728800
13 	289800	3018600
14 	299400	3318000
15 	309000	3627000
16 	318600	3945600
17 	328200	4273800
18 	337800	4611600
19 	347400	4959000
20 	357000	5316000
21 	366600	5682600
22 	376200	6058800
23 	385800	6444600
24 	388200	6832800
25 	388200	7221000
26 	388200	7609200
27 	388200	7997400
28 	388200	8385600
29 	388200	8773800
30 	388200	9162000
31 	388200	9550200
32 	388200	9938400
33 	388200	10326600
34 	388200	10714800
35 	388200	11103000
36 	388200	11491200
37 	388200	11879400
38 	388200	12267600
39 	388200	12655800
40 	388200	13044000
41 	388200	13432200
42 	388200	13820400
43 	388200	14208600
44 	388200	14596800
45 	388200	14985000
46 	388200	15373200
47 	388200	15761400
48 	388200	16149600
49 	388200	16537800
50 	388200	16926000
51 	412200	17.338.200
52 	412200	17.750.400
53 	412200	18.162.600
54 	412200	18.574.800
55 	412200	18.987.000
56 	412200	19.399.200
57 	412200	19.811.400
58 	412200	20.223.600
59 	412200	20.635.800
60 	412200	21.048.000
61 	412200	21.460.200
62 	412200	21.872.400
63 	412200	22.284.600
64 	412200	22.696.800
65 	412200	23.109.000
66 	412200	23.521.200
67 	412200	23.933.400
68 	412200	24.345.600
69 	412200	24.757.800
70 	412200	25.170.000
71 	412200	25.582.200
72 	412200	25.994.400
73 	412200	26.406.600
74 	412200	26.818.800
75 	412200	27.231.000
76 	412200	27.643.200
77 	412200	28.055.400
78 	412200	28.467.600
79 	412200	28.879.800
80 	412200	29.292.000
81 	412200	29.704.200
82 	412200	30.116.400
83 	412200	30.528.600
84 	412200	30.940.800
85 	412200	31.353.000
86 	412200	31.765.200
87 	412200	32.177.400
88 	412200	32.589.600
89 	412200	33.001.800
90 	412200	33.414.000
=Tier Beyond Red=
Once Eternal Crown has reached level 4 (star), units can be upgraded to Red +1 (see page for further upgrades, as higher Star levels allow going even beyond Red +1). In order to do so, there are two requirements: a minimum Transcendence level for the unit (per equipment) and a Scarlet Gold Ore payment.
Tier 	Equipment Minimum Transcendence	Equipment Minimum Transcendence	Equipment Minimum Transcendence	Equipment Minimum Transcendence	Cost
Tier 	#1 	#2 	#3 	#4 	Cost
Red +1	17 	18 	19 	20 	80
Red +2	32 	33 	34 	35 	160
Red +3	47 	48 	49 	50 	250
Red +4	59 	60 	61 	62 	400
Red +5	>65 75< 	>65 75< 	>65 75< 	>65 75< 	600