Does Unchecked Power deal 12 damage total split among all units, or does each unit take 12 damage?

Ruling: Unchecked Power deals 12 damage to EACH unit at battlefields simultaneously. Both friendly and enemy units take the full 12 damage.

Nuances:

• The phrase "deal 12 to ALL units" means 12 damage per unit, not 12 damage split among all units
• If the card intended split damage, it would use language like "split 12 damage among units" or "deal 12 damage divided among units"
• All units at all battlefields are affected, including your own units