Drawing an average four to six cards for five mana is a backbreaker in limited, and having this in the common slot to boot didn't hurt matters much
Garruk, Caller of Beasts 4 Potent card draw and some mild bonus ramp potential too
This means that you dont have to worry about anything that has indestructible, and you can also get payoffs from cards like It That Betrays that are looking for opponents sacrificing creatures
though you will have Time Lords in the form of Missy, The Master and The Valeyard, at least
I wont bury the lede on this one, its still a very good card, and should probably be played over any three-mana counter or two-mana conditional one
You can use it as a sort of protective spell by responding to an opponents removal spell and copying the creature they attempt to kill, or surprise a creature like Niv-Mizzet, Parun in combat to trade