Herald's Horn

Public decks that run Herald's Horn

• Ahoy Mateys - The Lost Caverns of Ixalan Commander, led by Admiral Brass, Unsinkable
• Avengers Assemble - Marvel Super Heroes, led by Captain America, Team Leader
• Cavalry Charge - March of the Machine Commander, led by Sidar Jabari of Zhalfir
• Draconic Domination - Commander 2017, led by The Ur-Dragon
• Eldrazi Incursion - Modern Horizons 3 Commander, led by Ulalek, Fused Atrocity
• Feline Ferocity - Commander 2017, led by Arahbo, Roar of the World
• Klingon Fury - Star Trek Commander, led by Worf, Defiant Commander
• Mind Flayarrrs - Commander Legends: Battle for Baldur's Gate, led by Captain N'ghathrod
• Raining Cats and Dogs - Secret Lair Drop, led by Rin and Seri, Inseparable
• Reign of Dragons - Foundations Commander, led by Lathliss, Dragon Queen
• Riders of Rohan - Tales of Middle-earth Commander, led by Éowyn, Shieldmaiden
• Sliver Swarm - Commander Masters, led by Sliver Gravemother
• Tyranid Swarm - Warhammer 40,000 Commander, led by The Swarmlord

Commanders that run Herald's Horn most

Deck counts from EDHREC.

• Giada, Font of Hope: 22,326 decks
• The Ur-Dragon: 21,896 decks
• Ulalek, Fused Atrocity: 17,773 decks
• Edgar Markov: 17,454 decks
• Éowyn, Shieldmaiden: 12,182 decks
• Sidar Jabari of Zhalfir: 11,687 decks
• The First Sliver: 10,823 decks
• Miirym, Sentinel Wyrm: 9,823 decks

Often played with Herald's Horn

Cards that show up in the same decks on EDHREC.

• Avengers Quinjet
• West Coast Expansion
• The Wasp, Winsome Avenger
• Jarvis, Earth's Mightiest Butler
• Locthwain Lancer
• Vanquisher's Banner
• Firebird, Blazing Ranger
• Lazotep Sliver
• Door of Destinies
• Photon, Mighty Marvel

Rulings

• 2017-08-25: If you somehow control a Herald's Horn with no chosen creature type, no spells will cost less to cast, not even creature spells with no creature type. You'll be able to look at the top card of your library at the beginning of each of your upkeeps, but you can never put it into your hand this way, even if it's a creature card with no creature type.
• 2017-08-25: You can't choose multiple creature types, such as "Cat Warrior." A Cat Warrior is both a Cat and a Warrior. It's affected by anything that affects either type and unaffected by things that affect non-Cat or non-Warrior creatures.
• 2017-08-25: If you don't put the top card of your library into your hand, you put it back on top of your library without revealing it. You'll draw it in that turn's draw step.
• 2017-08-25: To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
• 2017-08-25: You must choose an existing creature type, such as Vampire or Cat. Card types such as "artifact" can't be chosen.
• 2017-08-25: The effect of Herald's Horn reduces only generic mana in a spell's cost. If that cost has no generic mana, the cost isn't reduced.