Charging Centaur

Haste
When Charging Centaur enters the battlefield,
until end of turn, whenever a Centaur creature
enters the battlefield or attacks, you may have it
fight a creature you don't control. (Each deals
damage equal to its power to the other.)
Backup 1 (When this creature dies, create a 1/1
creature token that share all types and colors with
this creature.)