If you're bored, test out your luck and have fun drawing cards at Mitcher. (Don't take it too seriously. The result may or may not contain several errors.)
Due to the higher stage having lower material drop per AP ratio, the recommended stage to farm for this event is Quest 1/2/3 for clearing Shop, Quest 4 for Card Packs to draw the event card.
The first one is an AOE slam attack that apply a Healing Down debuff that decrease the healing that your ally received and also apply DEF UP buff to itself.
The second one is an AOE nuke attack that deal massive amount of damage.
You should wait for the Defense UP buff on the boss to expire (roughly around 2:26) before using all your DPS skill. About 20s (around 2:06) later the boss will use the 1st skill and apply the DEF UP again. If your DPS is strong enough, just use all of their skill and you should be able to clear the stage within 80s.
The boss 2nd attack skill deal a massive damage that can easily kill your backline. You should use someone like Serina or Neru (Bunny Girl) to reposition your tank forward to avoid getting your backline killed.
The stage will have 2 enemy with the Elite Enemy marker beside their health. These 2 simply have too much HP and cannot be killed normally.
The 2 Elite Enemy marker each have their own skill that give massive buff to other mob. You will have a difficult time killing the mobs when they get buffed, so stop their buff by using CC like Taunt or Stun on them.
Because the Elite Enemy cannot be killed. You will need to kill the specific mob to force them to retreat to the next area.
The Elite Enemy are part of the stage gimmick so you are not required to kill them to clear the stage. You only need to kill all mob and the boss.
A set of 4 cards will be presented to the players. Revealing the first card will cost 200Mushiqueen Card Pack, and the price will increase by 10 for any subsequent card after it (200, 210, 220, and finally 230); player can reset the hand at any point instead of revealing the next card, resetting the cost.
There are 4 rarities that can appear in the event card: SSR / Ultra Rare (Rainbow Border), Super Rare (Golden Border), Rare (Blue Border), and Normal (Gray Border).
Each set of 4 cards has a minimum of one SR or better card.
All 4 cards are random and a set might not contain an UR card.
Regardless of rarity, each card will always contain Ninpero-san Goods which is required to exchange items from the 3rd Shop.
Similar rarities will contain mostly the same rewards but at different quantities.