destroy all creatures target player control-7th turn

, , Sacrifice Mindslaver: You control target player during that player's next turn. (You see all cards that player could see and make all decisions for them.)

Changeling (This card is every creature type.) : Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

: Target player gains control of target artifact, creature, or land you control.