Horn of DeafeningHow it works & interactions with other cards

How the Ability Works

The Horn of Deafening has an activated ability that costs two generic mana and requires you to tap the artifact. Once activated, you target a single creature. When the ability resolves, it creates a prevention effect that lasts for the remainder of the turn. This effect specifically applies to combat damage, meaning any damage the targeted creature would deal while attacking or blocking is reduced to zero.

Resolution Step-by-Step

First, ensure you have two mana available and the Horn is untapped. During any phase before damage is dealt—most effectively during the Declare Attackers or Declare Blockers step—activate the ability by paying {2} and tapping Horn of Deafening, then choose your target. Once both players pass priority, the ability resolves. From that moment until the end of the turn, if that creature would deal combat damage, that damage is prevented. Note that the creature still counts as attacking or blocking; it simply deals no damage.

Strategic Timing and Constraints

A common mistake is waiting too long to activate the Horn. Once combat damage is actually dealt, it is too late to prevent it. You must use the Horn before the Combat Damage step begins. Additionally, remember that this effect only prevents combat damage; if the targeted creature has an ability that deals non-combat damage, such as a 'ping' effect, the Horn will not stop that damage from occurring.

When to Use the Horn

Use Horn of Deafening to stall your opponent's largest threat while you set up your own board state. It is particularly effective against creatures with Trample, as preventing all combat damage means no damage can 'overflow' to you. Because it is an artifact, it fits into any color deck, providing flexible defense for strategies that need time to develop.

Interaction examples

Neutralizing a Solemn Simulacrum

Solemn Simulacrum

If your opponent attacks you with Solemn Simulacrum, you can activate Horn of Deafening targeting it. When the ability resolves, the Simulacrum will deal 0 combat damage to you. However, since the Horn only prevents damage and does not destroy the creature, the Simulacrum remains on the battlefield, and its 'dies' trigger will not be activated.

Managing Resources

Commander's Sphere

To use Horn of Deafening, you need mana. You can tap Commander's Sphere to add one mana to your pool to help pay the {2} activation cost of the Horn. This allows you to maintain your defenses even if your lands are already tapped for other spells during your turn.

Repeatable Defense

During your opponent's turn, if they attack with a high-power creature, you can tap Horn of Deafening to prevent its damage. Because the Horn does not sacrifice itself, it will stay on the battlefield. On your next turn, the Horn will untap during your untap step, allowing you to use it again to stop another threat in a subsequent round of combat.