Can you use bellows breath repeated on the same unit which only has 1 might?

Yes, you can use Bellows Breath with Repeat to target the same unit twice, even if it only has 1 Might. However, the unit will not die until the entire spell finishes resolving.

Here is the breakdown of how this interaction works:

1. Targeting: Bellows Breath allows you to choose up to three units at a single location. When you pay the Repeat cost, you execute the effect a second time. While a single instance of the effect cannot target the same unit more than once, the second (repeated) instance can target the same unit again.
2. Resolution: The first instance deals 1 damage to the unit. Then, the second instance deals 1 damage to the unit.
3. Survival during Resolution: In Riftbound, damage is marked on a unit but does not reduce its Might. Lethal damage is only checked during Cleanup, which occurs after a spell has completely finished resolving.
4. Outcome: The unit will have 2 damage marked on it. Once Bellows Breath finishes both instances of its effect, the game performs a cleanup check. Since the 2 damage is equal to or greater than the unit's 1 Might, the unit will then be defeated and sent to the trash.

Key Nuances:

• Healing/Shields: Because cleanup doesn't happen between the two instances of damage, effects like Zhonya/Guardian Angel or triggered heals cannot save the unit "in the middle" of the spell; they will only trigger during the cleanup phase after the second 1-damage hit has already landed.
• Locations: You can choose a different location for the second instance of the Repeat effect if you wish.