Tadhg, the Awoken

Flying, Hexproof, First Strike
Sacrifice a treasure token: untap Tadhg, the
Awoken.
{b}{r}, {t}: Tadhg the Awoken deals 5 damage to
any target.
During your end step, sacrifice a treasure token;
if you cannot, exile Tadhg, the Awoken and
return it to the battlefield transformed under
your control.
... only that worlds fall when he does.