Imposter

Instead of casting this card on your side of the field
play it on an opponents side of the field.
This creature cannot
leave the battlefield under any circumstance. Whoever controls Imposter on their upkeep they must sacrifice a creature, if they cannot sacrifice a creature, they must sacrifice a permanent, if they cannot sacrifice a permanent they must skip their turn.
{5}, {t}: Target opponent gains control of this creature,
you cannot target the owner of the card.