Toji, Wizard Apprentice

{2}{r}, Sacrifice Toji, Wizard Apprentice: Deal 4
damage to target creature. This costs {r} more if
Toji, Wizard Apprentice has a -1/-1 counter on it.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its
owner's control with a -1/-1 counter on it.)
"This spell looks interesting! Wonder what it will do?"