When attacking with one unit against multiple defending units, can damage be split freely between defenders, or must lethal damage be assigned to one unit before assigning damage to the next?

Ruling: When assigning combat damage to multiple defending units, you must assign damage to one unit at a time until it receives lethal damage before you can assign any damage to the next unit. The exception is if a unit has Tank, which must be assigned damage first.

Sequence:

• Choose a defending unit to assign damage to (unless a unit has Tank, which must be chosen first)
• Assign damage to that unit until it has received lethal damage
• Only after assigning lethal damage can you move to the next unit
• Any excess damage after all units have lethal damage is assigned to the last unit

Nuances:

• Units heal after combat and won't have health markers remaining, which affects interactions with cards like Warwick that care about damaged units