Herald's Horn [Commander Masters] Wraith Locus of the Roil enters

Locus of the Roil enters the battlefield

shall be among the great whose valor will destroy the Shadow

search your library and/or graveyard for a card named TARDIS

or enchanted by anything black or red

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

Herald's Horn [Commander Masters] Wraith Locus of the Roil entersSet: 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.