So I'm sitting on some good stuff that I would like to trade up for higher value cards. I strongly prefer to not trade down.

• Sword of Light and Shadow
• Sword of War and Peace
• Sword of Fire and Ice
• Urborg, Tomb of Yawgmoth
• 2 Avacyn
• Daybreak Coronet
  + a bunch of other stuff

What I'm mainly looking for is

• Kozilek, Butcher of Truth
• Demonic Tutor
• Mana Reflection
• Mirari's Wake
• Seedborn Muse
• Arcanis the Omnipotent

Take a look and send me an offer if you're interested.