Bloodthirster

Haste, Menace, First strike.
If this card is put into your graveyard from the battlefield return it to your hand at the beginning of the next end step.
Bloodthirster must attack each turn if able.
Bloodthirster must be blocked each turn if able.
Whenever a creature dealt damage by Bloodthirster this turn dies put a +1/+1 counter on Bloodthirster.