Tivash, Devil Bringer

Life Link, Haste, Vigilance

This creature enters the battlefield with X+1/+1 counters on it up to the amount of {c} mana paid to cast it. For every 2 {c} mana remaining after it's casting become shield counters.

During either player's end phase if Tivash, Devil Bringer killed a creature summon an X/X black demon creature token with flying with X being that creatures power.