Hellsung Champion

Flash, Haste
Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block
as long as it has a +1/+1 counter on it.)
Hellbent - As long as you have no cards in hand,
you may cast Hellsung Champion from your graveyard, and if you control it, you may also
cast other cards with hellbent or unleash from
your graveyard.