High priority wants:
Avacyn, Angel of Hope
Doubling Season
Elspeth, Knight Errant
Enlightened Tutor
Joraga Warcaller
Mirror Entity
Mistveil Plains
Rhys the Redeemed
Sensei's Divining Top
Sol Ring
Sword of Fire & Ice (non-foil)
Windbrisk Heights

I don't really care about edition or is=f cards have seen play (still affects value) and prefer non-foils.

Everything else on my wishlist is lower priority but can be used to even out trade values.

Are you interested in trading the Modern Masters Sword for a Darksteel one? With additional stuff thrown in of course.