Gray Merchant of Asphodel [Mystery Booster] Kithkin Knight put a knowledge counter on

put a knowledge counter on The Magic Mirror

Set: Collectors' Edition Type: Artifact Rarity: Rare Cost: {2} Time Vault enters the battlefield tapped

" —Zur the Enchanter

Set: Hour of Devastation Prerelease Promos Type: Enchantment Rarity: Rare Cost: {6}{U} Whenever you cast an instant or sorcery spell

"It's my goal to find the melting point of every substance

Gray Merchant of Asphodel [Mystery Booster] Kithkin Knight put a knowledge counter onSet: Mystery Booster Type: Creature Zombie Rarity: Common Cost: {3}{B}{B} When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)