If Orange Lee Sin dies from combat damage and was buffing a Clockwork Keeper that also took damage, does the Clockwork Keeper die when it loses Lee Sin's buff?

Ruling: The Clockwork Keeper does not die. After combat damage is assigned and units are killed, they are immediately healed before any other game state checks and before any abilities are able to enter the chain.

Sequence:

• Combat damage is assigned to all units simultaneously
• Units that received lethal damage are killed
• All units are immediately healed
• Game state checks and abilities occur after healing

Nuances:

• You cannot assign over-damage to a unit; once lethal damage is assigned to a unit, you must assign remaining damage to the next unit
• The written rules initially suggested the Clockwork would die, but the FAQ clarified that healing occurs before the buff is removed, so the Clockwork survives