Trait Doctoring [Dragon's Maze]Set: Dragon's Maze Type: Sorcery Rarity: Rare Cost: {U} Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another until end of turn. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Set: Alpha Edition Type: Sorcery Rarity: Rare Cost: {1}{U} Take an extra turn after this one

Set: Sword & Shield: Chilling Reign Type: Water Rarity: Ultra Rare Retreat cost: Colorless

but you may put it on top of your library instead of into your graveyard

{B}: Transform Bloodline Keeper

Set: Wizards of the Coast: Black Star Promos Type: Item Rarity: Black Star Promo

Set: Alliances Type: Creature — Illusion Rarity: Rare Cost: {1}{U} Flying

Set: San Diego Comic-Con 2016 Type: Legendary Planeswalker — Gideon Rarity: Mythic Cost: {2}{W}{W} +1: Until end of turn

Then we'll build another one

Set: Saviors of Kamigawa Type: Legendary Creature — Spirit Rarity: Rare Cost: {3}{W}{W} Kiyomaro

As long as your devotion to black and green is less than seven

veteran explorer

Set: Commander 2014 Type: Sorcery Rarity: Rare Cost: {X}{4}{B} Destroy X target nonblack creatures