Dovakhiin, Dragonborn

Vigilance, Haste, Eminence-Whenever Dovakhiin is in the command zone or on the battlefield, during your upkeep put -4/-4 counters on target dragon and give +4/+4 to target creature you control. Whenever Dovakhiin kills a Dragon place +X/+X counters on Dovakhiin where X is that Dragons power.
To keep evil at bay! and the fiercest foes rout when they hear triumph's shout, Dragonborn, for your blessing we pray!- Song of the Dragonborn.