Call the Kin with Herald's Horn
Herald's Horn is a compact utility artifact that rewards tribal commitment. As it enters the battlefield you pick a creature type and from that point creature spells of that type cost {1} less to cast. The effect is immediate and persistent so it smooths out explosive starts and makes midgame curve decisions easier when you are building around a tribe.
The second ability doubles as passive card selection. Each upkeep you may check the top card of your library and if it matches the chosen type you can reveal it and take it. That makes Herald's Horn an efficient engine for decks that lean into consistent threats rather than high variance. Practical, predictable and deckbuilding friendly, it fits naturally into any Commander list that values reliable creature deployment.
Card Details:
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Mana Cost – {3}
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Card Type – Artifact
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Subtypes –
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Card Text / Rules Text (Printed) – 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 is a creature card of the chosen type, you may reveal it and put it into your hand.