The reason this is ahead of the other symmetrical draw spells is that it either generates you mana or costs none once it has resolved thus allowing you first dibs on using the new cards and no disparity in mana
Id consider that Game Over
Very appropriately, the Gruul are a bit less maniacal than the Rakdos, so this card lets you choose whether you want a sturdier or more aggressive creature
5 Druid of Purification Fair's Fair It's a little bit weird for a deck as artifact-heavy as Living Energy to have a card that invites destruction of your own artifacts, but for decks that aren't overly laden with enchantments and artifacts, Druid of Purification is a great way to blow up a bunch of cards
15 Ratchet, Field Medic // Ratchet, Rescue Racer Starting off we have Ratchet, Field Medic, a 2/4 with lifelink
I certainly would have paid more if Gravecrawler cost two mana and I didnt need another zombie in play to bring him back