also ice crystal, charm, alice, shanghai, shanghai meant Okuu could attacck THIRTY ONE TIMES in one turn
It's true that Okuu is a bit overtuned :)
By a player's 10th win, nearly 50% of all players they encounter use one. It looks like the most successful counters take advantage of Yukari (or Reisen) to try to directly attack Okuu and avoid tripping the ice crystals.
