Edited 3/10/2022: Yep, paper games is going absolutely crazy with UR events while knowing that they're crazy hard to complete with their gacha rates and lack of free currency. They've decided to release another double UR hell event after a month to regenerate in game currency, which isn't nearly long enough for those who are F2P. I can't in good faith recommend this money-mongering game to anyone. I'll still play because I'm already too far into it, but if you're a new player: it isn't worth it.