A fun idea I got for a blue/red uncommon. Maybe too much, but it could be a fun rare, if not a fun uncommon. Funcommon.

I think this would need to cost at least . I mean, it makes all thopters flying hasty 4/4s...

I'm pretty sure the number of times this is on the field and you play a creature that makes a thopter after it is going to be minimal enough that this is fine. Still, it's definitely a risky one!

Really? This is a first pick draft-around right there, and I would never play it in a deck if I couldn't be sure I wouldn't get artifacts in play after it, this taken into account, I'm up the price if it stays at uncommon. Heck, I wouldn't think this card to be inappropriate as a rare eithyer.

Is it too weird if putting artifacts into play turned a land into 4/4 haste creature for a turn.

This would essentially add one mana to the cost of using it (which I think would be good if we want to print anything that makes a lot of artifacts) and would make the creatures not have flying.

It's a draft-around, but I don't think it's an absurd one. However, upping the cost won't hurt it significantly, I think.

I think it making lands into 4/4s when artifacts enter is too disconnected.

Could this be an uncommon artifact?

Wouldn't that exacerbate the problem? And lead to the issue of whether it triggers upon itself.

That could easily be solved with "When CARDNAME or another artifact..." or "When another..."

Haste should also just need until end of turn, for memory issues.

Woops, yeah. Feel free to add that change

It's only a creature for that turn. Why separate the abilities?

Way too good in the playtest. Dropped down from 4/4 to 2/2.

I'd prefer a once per turn clause to allow it to work well with non-thopter artifacts.

It should still work well. The issue I have with once-per-turn clause is that it gets sadder with our multi-artifact makers.

However, one way to do something like 'once per turn' while not being as unsatisfying as outright stating 'once per turn' could be the following:

"At the beginning of combat on your turn, target artifact you control becomes an artifact creature with base power and toughness 2/2 until end of turn. It gains haste until end of turn."

That 'hides' the drawback and adds some consistency.

This is really powerful. I like it.