
Whenever a source an opponent controls deals damage to you, that player sacrifices a permanent of their choice.
Michiko Konda, Truth Seeker has 4 printings, first in Saviors of Kamigawa (2005). EDHREC ranks it #6,025 among Commander cards. It appears most in Queen Marchesa decks (5,535 on EDHREC). It has 3 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.