Matari Lobo, Blood Adept

Menace
When a creature dealt damage by Matari Lobo
this turn dies, create a blood token.
{p/r} Sacrifice a Blood Token: Matari Lobo gets
+2/-1 and gains first strike until end of turn.
{p/r}{p/b} Sacrifice 3 Blood Tokens: Exile Matari Lobo
and return it to the battlefield transformed under
it's owner's control.