Wow, that's a very powerful metalcraft ability. Which, by the way, is not at all blue.

Was trying to think of a blue part to the ability. Went with a flat card draw.

Yeah, wow. You can almost certainly activate that twice a turn; maybe three times - the drawing of cards is almost pure gravy on top of then sheer "and you're dead" damage this is going to deal.

This is ridiculously strong if you have metalcraft.

Changed the cost to make it a little harder to just keep activating it.

Oh, that's NICE - now it undoes its own metalcraft as you use it.

Though, as written, I think it doesn't depower itself quite quickly enough; but I'm sure that's fixable.

But without a mana cost.. well, that seems risky too.

It's easy to be able to drop this turn 3 and use it... you need five hits with this. Assuming one comes from turning sideways; you'd need seven artifacts in play to just outright win. Ok, that's quite a high bar, maybe it's safe.

changed to only hit creatures