Does the Deathknell effect in a combat clean up trigger before or after the unit heal?

In a combat showdown, Deathknell abilities resolve after the units are healed.

While the Deathknell trigger is placed on the chain as a "Pending Item" during the Combat Cleanup phase, the actual resolution of the effect—where the card text executes—occurs only after the healing step is completed.

The Official Combat Cleanup Sequence

According to the rules and RiftJudge FAQs (specifically #9514, #10061, and #10157), the process proceeds as follows:

1. Combat Damage Step: Combat damage is assigned and dealt to units (Rule 460.2).
2. Triggering Deathknell: Units with lethal damage trigger their Deathknell abilities. These triggers are added to the chain as Pending Items (Rule 808.1.d.2, Rule 323.4).
3. Killing Units: Units with lethal damage are moved to the trash (Rule 323.5).
4. Healing: All surviving units on the battlefield are healed (Rule 461.1.a.1).
5. Resolution: The game returns to the FEPR (Finalize, Execute, Pass, Resolve) process, and the Deathknell triggers that were added to the chain in Step 2 are now finalized and resolved (Rule 808.1.d.3).

Key Consequences

• Healing First: Because healing occurs in Step 4, any non-lethal damage on surviving units is cleared before your Deathknell effects resolve. You cannot use Deathknell effects to "finish off" enemy units that survived the initial combat damage, as they will be healed to full health before the effect resolves.
• No "Saving" Units: Because units with lethal damage are moved to the trash in Step 3, Deathknell effects cannot be used to "save" a unit that took lethal combat damage.