Herald's Horn (0360) [March of the Machine Commander]

Artifact · {3}

As this artifact enters, 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.

March of the Machine Commander #360 · uncommon · Art by Jason Felix