Unstable Mutation [Summer Magic / Edgar] Ixalan Prerelease Promos and Serpents you control can't

and Serpents you control can't be blocked except by Krakens

Set: Limited Edition Beta Type: Instant Rarity: Rare Cost: {W} Cast this spell only during combat before blockers are declared

Set: Limited Edition Alpha Type: Sorcery Rarity: Rare Cost: {X}{B} Target player discards X cards at random

—Arab proverb

this scheme deals 3 damage to each of your other opponents

Unstable Mutation [Summer Magic / Edgar] Ixalan Prerelease Promos and Serpents you control can'tSet: Summer Magic Edgar Type: Enchantment Aura Rarity: Common Cost: {U} Enchant creature Enchanted creature gets +3 +3. At the beginning of the upkeep of enchanted creature's controller, put a 1 1 counter on that creature.