If opposing units already have damage from a spell effect, does the attacker still need to assign lethal damage during combat, or can they assign less damage since the units already have damage?

Question

Accepted Answer

Ruling: When assigning damage during combat, you only need to assign enough damage to reach lethal when combined with damage already on the unit. You do not need to assign full lethal damage if the unit already has damage that hasn't been healed.

Sequence:
- Spell effect (Flurry of Blades) deals 1 damage to each unit
- During combat damage assignment, the attacker can assign 1 damage to the 2 might unit (bringing it to 2 total damage, which is lethal) and 3 damage to the 4 might unit

Nuances:
- This only applies if the damage has not been healed yet