Amnesia

Ritual Limited: Bow this Shugenja and at least one of your other Shugenja, and destroy this Spell, to target another player's Stronghold or Sensei. Until your Events Phase a number of turns from now equal to the number of Shugenja in this Ritual, the target Stronghold's or Sensei's actions cannot be used, and its traits have no effect, except those traits involving victory or elimination conditions or changes to that player's Family Honor.