Moonlit Mystery

This is the seasonal PvE event of beginning of Autumn 2021. It is scheduled to begin on 17th of September and last for 6 days.
Its story focuses around the lunar cycle that reveals various monsters that the player can defeat in exchange for specific currency - which in turn can then be exchanged for various rewards.
=General Idea=
For those who want a quick overview of the event, here is what you have to do:
* Consume Energy in Main Story and/or Underground (Story) to obtain Copper Coins
* Spend the Copper Coins in the Event Store to get Osmanthus Wine - you'll need a total of 8 Wines, hence 80 Copper Coins
* Repeat the following steps four times:
** Go to the Outer World and give the the required Wine amount (1/2/2/3)
** Click on and adjust the moon in the Outer World in accordance to Swordsman riddle (you can try as many times as you want so just keep trying until you get it right)
** Fight and defeat the monster that shows up on adjusting the moon properly - don't sweep!
** Go to Inner World and light up the indicated Lantern
* You can continue to sweep up to 175 more times the most difficult monster for optimal Cake reward
* Spend cakes to get rewards in the event store
=Access=
The event can be accessed from the top-right menu in the Town by clicking on the specific icon (yellow moon behind white clouds).
The interface of the event is split between an Inner and Outer World. The player can switch between two at any moment.
=Currencies=
The event features 3 currencies:
* Exotic Copper Coin - fight in either Main Story or Underground (Story) to get the equivalent of 1 coin/6 
* Precious Moon Cake - fight monsters in the Outer World to obtain it, then exchange in "Festival Stall" (Event Shop) for various rewards
* Osmanthus Wine - buy in exchange for Copper Coins in the "Festival Stall" and give to the Swordsman in the Outer World to unlock new stages
=Festival Stall=
This is the event store that can be accessed from both the Inner and Outer World. 
The first function is to exchange Copper Coins for Osmanthus Wine at a 10:1 rate. Excess coins can then be exchanged for one Moon Cake at an 100:1 rate (up to 6 only).
The second role is to exchange Moon Cakes for various rewards. See table below for these.
Reward 	Stock	Cake Cost
Orange+ Artifact Chest 	1 	2250
Random Orange+ Artifact Chest 	1 	1950
Orange Artifact Chest 	1 	720
Purple+ Artifact Chest 	1 	180
10x Commander Selection Chests	8 	600
1000x 	4 	400
10x 	8 	150
10x Quiet Pearl 	4 	400
10x Glittering Pearl 	6 	160
5x 	8 	120
1x 	10 	70
10x Random SSR Token 	3 	360
3x 	6 	150
1x 	10 	65
1x 	10 	45
2x 	10 	15
1x 	30 	25
1x 	10 	15
1x 	5 	25
1x 	10 	20
8000x 	9999 	1
900x 	9999 	1
=== Copper Coins ===
Item 	Stock	Limit	Copper Coins	Total Energy Needed (6 per Coin)
Osmanthus Wine 	1 	8 	10 	480
Precious Moon Cake	1 	6 	100 	3600
=Outer World=
This is where the action for the event happens. The idea here is the following:
* There is a total of four monsters hidden on the map. You will need to unlock them in order.
* The monsters reveal themselves based on the phase of the moon - hence you need to adjust the moon appropriately to reveal the monsters
* To know how to adjust the moon, you will need to answer riddles from the Swordsman.
* To receive the riddle, the Swordsman will require payment in Osmanthus Wine (you can obtain it from the "Festival Stall").
* In order to get the next riddle, the current monster must first be fought and defeated once.
* You can't adjust the moon on your own - you need to get each riddle in order before you can solve it!
Riddle No.	Wine Cost	Moon Position
1 	1 	Almost full - extreme right side dark
2 	2 	Almost new - extreme left side lightened
3 	2 	Half Moon (Left side lightened, right side dark)
4 	3 	Full Moon (fully lightened)
==Monsters==
As explained, each monster must be revealed and defeated at least once, in order - they also become increasingly difficult. First time must be defeated manually, afterwards can be sweeped.
* Fighting a monster costs 6. 
* Defeating a monster the first time will reward the player with 100 as well as a variable number of Gold Keys.
* Each time a monster is defeated (first or subsequent) grants the player 4 Material boxes and a specific number of "Precious Moon Cakes".
* The event restricts the player to 30 battles per day (regardless of the monsters fought) - up to 180.
Monster 	Keys	Moon Cakes
Stone Gargoyle	2 	8
Pit Lord 	2 	9
Vampire 	3 	10
Gnoll 	3 	11
Because each monster needs to be defeated once, and all can collectively be fought 30 times per day, this leads to a maximum number of 1974 Moon Cakes that can be obtained thorough the event (8 + 9 + 10 + 11 + [11 x 176]).
Note: if your power level is sufficient, it is recommended you sweep the last monster alone. This will give the most cakes for the same energy cost.
=Inner World=
The Inner World represents a safe place for the player. 
* The player can unlock a Lantern after defeating a new monster the first time. 
* Lanterns must be lightened in order
* Lightening a Lantern grants the player a specific reward
* Each lantern can be lightened once per event
Lantern No.	Reward
1 	2
2 	2
3 	2500
4 	500
=Store=
Note that supplementary Moon Cakes can also be purchased in the shop either in exchange for Diamonds or real money.
Cost	Moon Cakes	Times
1 	10 	1/Day
360 	100 	6 Total
850 	250 	3 Total
400 	100 	5 Total
6716	1910 	GRAND TOTAL