Apex Altisaur and Cityscape Leveler are massive removal spells that Animar makes eminently more castable
Dragonologist Dragonologist does a little bit of everything you want early on: It digs for dragons, instants, or sorceries when it enters, and then once you start dropping your dragons, it gives them hexproof as long as they stay untapped
Moreover, we can even cast her for the Warp cost at early game to gain cheap draw early and cast her from exile on a later turn
Sure you get +3/+3, but unless you can generate Energy, you're going to have about 2 turns of this being useful on the offensive
Your opponent gets a 3/3 Elephant instead of a 1/1 Human
For Commander deckbuilding, color identity is dynamically defined by the commander(s) put into the Commander pane