Herald's Horn [Commander Masters] Wraith or enchanted by anything black

or enchanted by anything black or red

Labyrinths of tunnels beneath the streets of the Caldaia offer an ample array of discreet routes for enterprising smugglers

Locus of the Roil enters the battlefield

"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

Herald's Horn [Commander Masters] Wraith or enchanted by anything blackSet: 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.