Just a dumb idea that popped into my head.

Based on Force of Savagery, I'd say this can be bigger. The minimum amount of mana before casting it is... I guess 2 across turns 1 and 2 if you do Plated Sliver and Artificial Evolution; but more likely 2 on turn 2 with Veteran Armorer. To get it in green or blue you need Gaea's Anthem or other equivalent 3-drops, delaying this until turn 4. So I think this could easily be 3/0.

Do you think another reasonable change is for a 1/0, still with evolve? I'm not sure how well evolve "fits" on it if it's colorless though, but it broadens the possibility of the card.