Originally posted by h1a8
Suicide Squad: King Shark #7
He severs his arm as bait to king cockroach. Then he regrews it back in a matter of moments (a few panels).
I'll post the scan later if you want.
Easily his best healing feat, but still not what you're describing.
Before the feat, he runs and hides from the Roach King and hatches a plan. Then at some point in time he chews his own arm off, but we have no idea how much time passes. At least enough for him to saturate his severed arm with poison from spray paint, and then lay the trap.
Then he fights Roach King without any healing. Roach King succumbs to the poison.
Three pages after Roach King first finds the trap, the bone starts to regrow. Two pages later, he has a little baby limb.
Healing factor? Yes, sure.
In "a matter of moments (a few panels)"? No.
Did his healing come into play during the fight? No.
So... has his healing ever actually helped him during a fight? Because elsewhere in that same series, he has cuts and wounds long after the fight is over.