Herald's Horn - [Surge Foil] Warhammer 40,000 Commander (40K)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.

Each player who sacrificed a permanent this way reveals the top card of their library

exile a card from a graveyard

Players can't gain life

choose target artifact card in your graveyard

Sacrifice another creature: Put a -1/-1 counter on up to one target creature and draw a card

Kavu emerged all across Dominaria

Target creature gains haste until end of turn

As Species Specialist enters the battlefield

When Mirrodin's varied civilizations developed ways to fight the levelers

Whenever Rotlung Reanimator or another Cleric dies

) When you cycle Gempalm Polluter

) {4}: Create two 0/1 colorless Eldrazi Spawn creature tokens