Yu

{u}{u}{u}{b}
A greatly empowered Yuki-onna (by the water ryune). If you can decipher its true name once and summon it using the water ryune/stair, you can summon this Yuki-onna to aid you. In addition, you can immobilize 3*amount of players non-fabled enemy entities for 3 rounds, choose a random card from each player and "lock it" for 5 rounds (it can't be played), and multiply all your ice entity stats by 1.2.