Cavern of Souls [Ultimate Masters]Set: Ultimate Masters Type: Land Rarity: Mythic As Cavern of Souls enters the battlefield, choose a creature type. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

Whenever Sphinx Ambassador deals combat damage to a player

and he was gone

Set: Commander 2014 Type: Creature — Elf Warrior Rarity: Rare Cost: {G} Multikicker {1}{G} (You may pay an additional {1}{G} any number of times as you cast this spell

"Recantation"

tap Rohgahh of Kher Keep and all creatures named Kobolds of Kher Keep

Hatred outlives the hateful

Set: Tenth Edition Type: Creature — Spirit Rarity: Rare Cost: {3}{G}{G} Untap all permanents you control during each other player's untap step

Set: Alpha Edition Type: Sorcery Rarity: Common Cost: {2}{G} Destroy all enchantments

Then exchange control of artifacts the same way

"Unskin these impure bodies

Set: Hour of Devastation Prerelease Promos Type: Enchantment — Aura Curse Rarity: Mythic Cost: {6}{W}{W} Enchant player

if there are four or more card types among cards in your graveyard