Serperior (13/149) [Boundaries Crossed] Foiling:Foil Whenever another creature you control

Whenever another creature you control enters

Set: Media and Collaboration Promos Type: Instant Rarity: rare Cost: {B} As an additional cost to cast this spell

Set: Doctor Who Type: Enchantment — Aura Rarity: uncommon Cost: {3}{R}{G} Enchant artifact or land Enchanted permanent has "{T}: Target player adds two mana of any one color

Set: Amonkhet Invocations Type: Enchantment Rarity: special Cost: {1}{B}{B} {B}

Set: Fourth Edition Type: Creature — Bird Rarity: rare Cost: {G} Flying {T}: Add one mana of any color

Serperior (13/149) [Boundaries Crossed] Foiling:Foil Whenever another creature you controlSet: Boundaries Crossed Rarity: Holo Rare