Can I kill a Guardian Angel units with a repeated Bellows?

Yes, you can kill a unit equipped with Guardian Angel using a repeated Bellows Breath, but the Guardian Angel will be destroyed in the process, saving the unit from death.

Here is the breakdown of how this interaction works:

The Sequence of Events

1. Playing the Spell: You play Bellows Breath and pay the [Repeat] cost. This creates two separate instances of the spell's effect ("Deal 1 to up to three units at the same location").
2. Resolution:
   • First Instance: You deal 1 damage to the unit equipped with Guardian Angel.
   • Second Instance: You deal 1 damage to the same unit again.
3. Cleanup and Lethal Damage: In Riftbound, damage is marked on a unit, but lethal damage is only checked during the Cleanup phase after the entire spell has finished resolving (see RiftJudge FAQ #8454 and #5839).
4. Replacement Effect: Once the spell finishes, the game checks for lethal damage. Because the unit has taken 2 total damage, it would normally die. However, Guardian Angel has a replacement effect: "If I would die, kill Guardian Angel instead. Heal me, exhaust me, and recall me."
5. Outcome: The Guardian Angel is destroyed (sent to the trash), and the unit is healed, exhausted, and recalled to your base. The unit survives.

Important Nuances

• Guardian Angel is a Replacement Effect: Because Guardian Angel replaces the "death" event, the unit never actually dies or goes to the trash. This is why the unit survives (see RiftJudge FAQ #8433 and #9367).
• No "Mid-Spell" Save: You cannot trigger Guardian Angel between the two instances of damage from the repeated Bellows Breath. The spell must resolve completely before the game checks for lethal damage and applies the replacement effect (see RiftJudge FAQ #5839).
• One-Time Use: Guardian Angel is destroyed when it saves the unit. If you were to deal lethal damage to that same unit again later in the turn, it would no longer have the protection of that Guardian Angel (see RiftJudge FAQ #9438).