
Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
As long as Imperious Mindbreaker is paired with another creature, each of those creatures has "Whenever this creature attacks, each opponent mills cards equal to its toughness."
Imperious Mindbreaker has 3 printings, first in Crimson Vow Commander (2021). EDHREC ranks it #14,907 among Commander cards. It appears most in Captain N'ghathrod decks (1,451 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.