Battle Strain [Odyssey] Snake Shaman if Myr Servitor is on

if Myr Servitor is on the battlefield

Set: Duel Decks Anthology Type: Artifact Rarity: Uncommon Cost: {2} Whenever a player casts a white spell

Set: Commander 2011 Type: Instant Rarity: Rare Cost: {2}{R} The owner of target permanent shuffles it into their library

Evoke {R} (You may cast this spell for its evoke cost

Set: Amonkhet Type: Creature — Sphinx Rarity: Rare Cost: {3}{U}{U} Flying

Battle Strain [Odyssey] Snake Shaman if Myr Servitor is onSet: Odyssey Type: Enchantment Rarity: Uncommon Cost: {1}{R} Whenever a creature blocks, Battle Strain deals 1 damage to that creature's controller. The pits swallow the weak as predators swallow prey.