Commensuration of Might

As you cast Commensuration of Might, you may exile any number of cards from your hand. Until end of turn, target creature you control gets +X/+X and gains trample. X is equal to the combined mana cost of all cards exiled this way.
"Rage until your heart grows weary, fight until your body can fight no longer. And when you're about to breathe your last, Eldaar shall channel into you; the rage of your brothers and strength from your sisters. The souls of yesteryear do not fade into tim