Ancient Worlds Mode

Ancient World mode is activated by defeating the Trio of bosses.
You need a Ancient Charm, which is made with 40 Ectoplasm, 20 Beetle Husks, and 50 Chlorophyte Bars.
==Bosses==
You fight one by one, trying to defeat them before day comes. 
Phazing Eyelid (A giant eye made of metal, has a large laser cannon.)
20,000 HP
75 Attack (100 for its beam.)
10 Defense
The boss moves around keeping its distance from the player, then charges a laser for a brief moment.
Its laser it gigantic and deals massive damage.
Crimson Clingers (A large chunk of flesh with clingers attached.)
18,000 HP
100 Attack (Same for Clingers.)
30 Defense
This boss moves faster and faster when its health drops, it has clingers that try to reach the player.
Vampires Heart (A huge heart.)
29,000
75 Attack (40 for Ichor and 50 for Spikes.)
15 Defense
It follows the player shooting ichor, or it can shoots spikes in the players direction.
==Ancient Worlds Begin!==
The message "The world has been swept with famine." will appear.
Plains Changes
The trees grow very tall and the grass grows 3x the size, and you can find ancient grass altars on the surface.
Plains Monsters
Grass Leaper (Acts like Derpling.)
500 HP
65 Attack
35 Defense
Killer Bird (Flies into player.)
100 HP
40 Attack
30 Defense
Grassworm(Clings to trees.)
1000 HP
100 Attack
20 Defense
Planzite
When a Ancient Grass Altar is destroyed it turns into 2 Planzuim Ore.
When Planzium Ore is mined it gives you 5-10 Planzite.
Plantlight Forge
Made with 10 Planzite and 2 Adamantite Forges.
Planzite Tools
Planzium Bar
Made with 5 Planzite, 3 Copper Ore, 3 Iron Ore, 3 Silver Ore and 3 Gold Ore
Tooltip : A bar made from the essence of time and space.
Planzite Mining Laser
500% Pickaxe Power
500% Axe Power
500% Hammer Power
Made with 10 Planzite Bars
Planzite Fork
200 Melee Damage
Fast Speed
Average Knockback
Made with 15 Planzite Bars
Planzite Cannon
300 Ranged Damage
Very Slow Speed
No Knockback
Made with 20 Planzite Bars
Planzite Longsword
400 Melee Damage
Slow Speed
Strong Knockback
Made with 30 Planzite Bars.
Planzite Armor (30 Planzite Bars Each.)
Headpiece : 35 Defense
Breastplate : 50 Defense
Leggings : 30 Defense
Set Bonus : +25% Critical Strike Chance.
==The Drained Biome==
The Drained Biome replaces Crimson or Corruption.
Its grass and dirt is grey, its trees being black.
Monsters
Alligator (Hides until player is in water, then charges.)
500 HP
85 Attack
40 Defense
Invader (Floats down from the sky, when it hits the ground it will launch back up.)
1000 HP
100 Attack
35 Defense
Drill Head (Quite small, drills through ground to get to player.)
325 HP
88 Attack
15 Defense
==Bamboo Biome==
This replaces the jungle, its made with unminable bamboo blocks.
Its holds Tribirium on the bamboo stalks, which can be mined.
Monsters
Bamboo Zombie 
785 HP
130 Attack
45 Defense
Tribal Warrior (Throws spears.)
500 HP
100 Attack (95 for Spear.)
10 Defense
Tribal Mage
1000 HP
50 Attack (75 for Bolt.)
25 Defense
Tribirium
Tribe Forge
Made with 3 Tiki Torches and 5 Tribium.
Used to craft Tribal Bars.
Tribal Bar
Made with 2 Tribium
Tribal Armor (5 Tribal Bars each.)
Helmet (50 Defense +10% Melee Speed.)
Chestplate (76 Defense +25% Critical Strike Chance.)
Leggings (30 Defense +10% Damage.)
Set Bonus : Enemies take 2x recoil damage.
Elder Stick (Very long spear.)
700 Melee Damage
No Knockback
Fast Speed
Made with 4 Tribal Bars
Bamboo Sword
1000 Melee Damage
Insane Knockback
Fast Speed
Made with 7 Tribal Bars.
Tribal Chakram
900 Melee Damage
Weak Knockback
Very Fast Speed
Made with 10 Tribal Bars.
==Final Bosses==
Paladin Sergeant (Found in Dungeon Rarely, shoots 2 hammers at once.)
60,000 HP
200 Attack (190 for Hammer.)
60 Defense
Great Slimer (Flies and shoots blobs, then splits into 10 Ancient Slimes, found in crimson or corruption.)
100,000 HP
300 Attack (200 for Blobs.)
0 Defense
Terra Blob (Hovers and swoops.)
300,000 HP
200 Attack
0 Defense
When down to 200,000 HP it transforms into a Core.
Terra Core (Fires flaming bolts and charges with great speed.)
200,000 HP
200 Attack (150 for Bolts.)
30 Defense
He finally splits into 2 Computers.
Computer (Charges at the player and shoots missles.)
50,000 HP
300 Attack (200 for Missle.)
50 Defense