Herald's Horn [Commander Masters] Wraith You may play historic lands

You may play historic lands and cast historic spells from the top of your library

shall be among the great whose valor will destroy the Shadow

"I'm afraid your investigation has reached a dead end

Set: Mystery Booster 2 Type: Instant Rarity: Common Cost: {3}{B} If you control a Swamp

if that spell's mana cost or that ability's activation cost contains {X}

Herald's Horn [Commander Masters] Wraith You may play historic landsSet: Commander Masters Type: Artifact Rarity: Uncommon Cost: {3} As Herald's Horn enters the battlefield, choose a creature type. Creature spells you cast of the chosen type cost {1} less to cast. At the beginning of your upkeep, look at the top card of your library. If it's a creature card of the chosen type, you may reveal it and put it into your hand.