Sekki removes a number of +1/+1 counters from it equal to the damage it would've been dealt and creates that many 1/1 Spirit creature tokens, which are Bears due to
Xenograft.
When the Spirit Bear(s) enter the battlefield,
Ayula triggers that many times.
If
Sekki is on the battlefield, resolve an
Ayula trigger, causing
Sekki to fight a creature you don't control, and then repeat from step 3.
If
Sekki is not on the battlefield, activate
Sekki by sacrificing eight Spirits, returning it from your graveyard to the battlefield as a Bear with eight +1/+1 counters on it due to
Xenograft.
If
Sekki entered the battlefield,
Ayula triggers, causing
Sekki to fight a creature you don't control.
Repeat from step 3.
Notes
You may repeat this loop whenever a creature enters the battlefield under your control.
Results
Destroy all creatures opponents control whenever a creature enters the battlefield under your control.