How is combat damage assigned when Kayn (with 6 might and immunity to damage) attacks Viktor and 4 tokens (total 6 health)?

Ruling: The attacking player (Kayn's controller) decides how to assign their unit's damage to enemy units. All damage is dealt simultaneously. Since Kayn is immune to damage, combat results in a draw and Kayn retreats to base.

Sequence:

• The attacking player assigns their unit's might as damage to enemy units
• All damage is dealt at the same time
• If combat results in a draw (neither side dies), the attacker retreats to base

Nuances:

• With 6 damage to assign, Kayn's player could kill all 4 tokens and assign 2 damage to Viktor, or kill 3 tokens and deal 3 to Viktor, or kill Viktor and 2 tokens
• Kayn cannot kill all units because he only has 6 damage total to assign