Kobold Ogre

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Trample
When you cast Kobold Ogre, return X
target Kobold cards from your graveyard to
your hand. When Kobold Ogre enters the
battlefield, put X +1/+1 counters on it.