Zekrom (114/114) [Black & White: Base Set]Set: Black & White: Base Set Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless,Colorless

" —Itzama the Crested

Set: Kids WB Promos Type: Fire Rarity: Promo Retreat cost: Colorless

Set: Southern Islands Type: Grass Rarity: Promo Retreat cost: Colorless

Set: Sun & Moon: Team Up Type: Darkness Rarity: Secret Rare Retreat cost: Colorless

Sacrifice another Serpent: Choose one —

Set: Limited Edition Alpha Type: Artifact Rarity: Rare Cost: {1} Mana Vault doesn't untap during your untap step

" —Jin-Gitaxias

and you may spend mana as though it were mana of any color to cast them

Set: Antiquities Type: Enchantment — Aura Rarity: Uncommon Cost: {U}{U} Enchant artifact

Set: Limited Edition Alpha Type: Land — Swamp Mountain Rarity: Rare ({T}: Add {B} or {R}

Set: Zendikar Rising Prerelease Promos Type: Creature — Insect Rarity: Rare Cost: {2}{G} Landfall — Whenever a land enters the battlefield under your control

Set: Black & White: Noble Victories Type: Grass Rarity: Ultra Rare Retreat cost: Colorless