Kaervek the Merciless [Archenemy]

Set: Archenemy Type: Legendary Creature — Human Shaman Rare Cost: {5}{B}{R} Whenever an opponent casts a spell, Kaervek the Merciless deals damage to any target equal to that spell's converted mana cost. "Rats and jackals feast in his swath, but even they will not walk with him." —Mangara