Master Pakku (TLA-063) [Avatar: The Last Airbender] Foil

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever Master Pakku becomes tapped, target player mill X cards, where X is the number of Lesson cards in your graveyard. (They put the top X cards of their library into their graveyard.)