Pretty obvious Stoneforge Mystic deck.

Thinking practically in the modern format, surviving to Stonehewer Giant is difficult, let alone having him stick around and activate.

With that said, Argentum Armor and Elbrus, the Binding Blade  ^Flip are only realistic off the back of a stonehewer, effectively making them useless in your hand at any point in time. On the surface, they seem very powerful, but in a fast and/or controlling format like modern, they're just too slow, and are more of a liability than anything.

Lightning Greaves is a fantastic card, and I think the deck could warrant 1-2 of them. The haste is less relevant than the shroud, unless you only have 1 creature.

I also don't think Ornithopter is worth the spot. I see what you're trying to do with it, getting metalcraft off sooner, and having an evasive body to throw swords on, but with all the prot colors that swords give you, you don't really need any evasion (since running 1 of each and 3 Steelshaper's Gifts acts as though you have a playset of each sword for statistic purposes. More if you include Stoneforge Mystic)

The Etched Champion in your maybeboard is very good here. I'd also raise the landcount to 23 personally.

Isn't Stoneforge Mystic banned? Otherwise, I agree and will try to work it out

Wow, you're correct. Where have I been for the past long while?

Ethersworn Canonist Make room for this slut. she's always fun to play. Makes people use all the removals. all of them. unless shes sworded ;P