Rafaam, Spender of Youth

Whenever an opponent casts a creature spell,
exile it and they create a 1/1 token copy of it with
"When this creature leaves the battlefield, return
the exiled card to the battlefield under its
owner's control".
{t} Gain control of target creature with power
1 or less. Untap that creature. It gains haste.
Sacrifice it at end of turn.