If Bellows Breath with Repeat targets the same 1 might unit twice, will Zhonya/Guardian Angel proc between the two instances of damage and save the unit?

Ruling: No, Zhonya/Guardian Angel will not proc between the two instances of damage. The unit will be saved from death during cleanup after the spell finishes resolving completely.

Sequence:

• Bellows Breath deals 1 damage to the unit (first target)
• Bellows Breath deals 1 damage to the unit again (second target from Repeat)
• The spell finishes resolving
• Cleanup occurs, checking for lethal damage
• Zhonya/Guardian Angel procs during cleanup, saving the unit from death

Nuances:

• Damage is not checked for lethal until cleanup
• Cleanup cannot occur in the middle of a spell resolving