When Kog'Maw dies in combat against a 5 health unit, does the Deathknell 4 damage trigger before healing, potentially killing the other unit?

Ruling: Kog'Maw's Deathknell triggers and resolves before the healing step, dealing 5 total damage (1 from combat + 4 from Deathknell) and killing the other unit.

Sequence:

• Combat damage is marked (Kog'Maw takes 1 and deals 1)
• Units with lethal damage are removed (Kog'Maw dies, triggering Deathknell)
• Deathknell trigger is added to the chain and must fully resolve before proceeding
• Deathknell deals 4 damage to the other unit (total 5 damage marked)
• Only after the chain is empty does the game proceed to clear damage/healing

Nuances:

• Triggered abilities can interrupt any step and must resolve before the game proceeds to the next step
• Nothing progresses until the chain is empty
• The rules as written are unclear on this interaction and will be clarified in future comprehensive rules updates
• This is intended behavior to allow Deathknell to combine with combat damage