Zendikar Resurgent : Whenever you cast a creature spell you Primordial Sage may draw a card
Creatures you control gain lifelink, indestructible, and protection from each color until end of turn
Think about cards like Krenko, Mob Boss, where you want to make as many goblins with that ability as possible, and Marvin can do it too
It just generates so much value, rewarding you for sacrificing zombies with more zombies and providing a solid sacrifice outlet
I am not surprised the two top spots are occupied by these two similar spells, as they both really shine in a variety of decks and almost always can hit something relevant and give you an early advantage
The exalted is generally better than having a power itself as you want to be tapping it for mana and having bigger guys attacking is more effective (particularly early in the game) than more smaller creatures of the same power