flavorText: Those who intrude upon the Dimir seldom remember that they have done so.
name: Wall of Lost Thoughts
originalText: Defender
  When Wall of Lost Thoughts enters the battlefield, target player puts the top four cards of their library into their graveyard.
printings: J25, JMP, RNA
text: Defender (This creature can't attack.)
  When this creature enters, target player mills four cards. (They put the top four cards of their library into their graveyard.)
type: Creature — Wall