Does Foxfire deal 4 damage to each unit with Might under 4, or does it deal 4 damage total distributed among units?

Ruling: Foxfire deals 4 damage total that must be distributed among units, not 4 damage to each unit.

Nuances:

• You can distribute the 4 damage in any combination (e.g., four 1-Might units, two 2-Might units, one 2-Might unit and two 1-Might units, etc.)
• The key word is "total" which indicates the damage is shared across targets