Sakashima's Will

Choose one. If you control a commander as you cast this spell, you may choose both instead. • Target opponent chooses a creature they control. You gain control of it. • Choose a creature you control. Each other creature you control becomes a copy of that creature until end of turn.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6okmp9ey01pb1h4f5okqug.