Dunstan, Herald of the Wild

Whenever you cast a spell, you may increase its
cost by {2}. If you do, you gain 4 life as it resolve.
Spells you cast have "Adamant — If at least three
green mana was spent to cast this spell, create a 2/2
green and white Elk creature token."
Spells you cast have "Adamant — If at least three
white mana was spent to cast this spell, put a +1/+1
counter on each Elk creature you control."