Loki, God of Mischief

Whenever Loki, God of Mischief blocks or
becomes blocked, exile him, then return him
to the battlefield under his owner's control
at the beginning of the next end step.
{1},{t}, Untap target attacking creature and
remove it from combat.
If Loki, God of Mischief were to die, instead
return him to your hand at the beginning of the
next upkeep.