Garfik, Firstborn of Gaea

Hexproof, trample, haste
Whenever Garfik, Firstborn of Gaea enters the battlefield, another target creature gets +X/+X and trample where X is the amount of mana spent to cast Garfik, Firstborn of Gaea
"You will go. You will build. You will conquer. May your birth right be gloriously bestowed upon you."