Random Generator gave me Clockwork Hydra and Regress (The Rise of Elderazi) one.) I toyed for a little while, and ended up with this. Good. The last of the common slots are filled.

Also, I'm pretty sure the usual Magic editing guide, would force me to say "do not" instead of "can not". I just don't want new players thinking they have an option with this guy. Might need some mild reminder text, instead.

Nah, I think "If you can't" is fine. It's in the current reminder text for Fading, and it's used on things like Archdemon of Greed and Eldrazi Monument too.

This card looks fine (possibly too similar to Clockwork Vorrac, but that's fine). The only strange bit is the name and creature type... doesn't sound much like an artifact creature to me.

Mmm. I was trying to pull flavor from the Elderazi Regress over the Hydra to mix things up. The unfortunate problem: Add technology to Elderazi spawns, and suddenly you have Phyrexia.

Switched flavor to Insect, which works a little better with artifacts. I tried to Google Image "Robot Spawn" to get an idea of what that might look like, but mostly, I got Tod MacFarlane's Spawn dressed up as a robot. :S

Oh, and my 'can't' problem was caused by not finding the words 'if you can not' in all of Gatherer. Evidently, Wizards always contracts 'can not' to 'can't' (which I should have been searching for) but not 'do not' to 'don't'. Weird.

Hm, I just realised this can't actually deal any combat damage until you've spent a turn charging it up. That's quite a drawback. Could this be 4 mana to cast rather than 5?

Oh, a comment I missed back in January. You know, I'd argue that its a common, and doesn't need to be efficient, especially since it's already better than Zephyr Spirit in, like, 5 or 6 ways (which, I know, Zephyr Spirit is horrible. I'm just saying that this could be a 0/4 defender and it would still have a use.) But lets drop it to 4 anyway. Cards with drawbacks should be pushed for Spike, otherwise only Uber-Johnny likes them.