Also known as: One-Arm RNC · Crucifix Neck Attack · Lapel Crucifix Choke (gi)
With both of their arms neutralized — one in your legs, one in your hand — the neck is undefended by definition: a one-armed rear naked grip or a lapel wrap finishes what the position already decided.
Submission · Strangle (blood choke) · Gi & No-gi · Difficulty 3/5 · Usually learned at Blue belt
Starts from Crucifix as the attacking player → ends the match (submission).
The details that make it work
Keep the leg-trapped arm stretched away; slack there is their only path back into the fight.
No-gi: one arm wraps the neck, hand finds your own shoulder or their far collarbone, chest expands to finish.
Gi: feed the near lapel across the throat instead — slower, tighter, even harder to defend.
Where it goes wrong
Letting their trapped arm bend and slip out of the legs mid-choke.
How opponents counter it
Fight to free the leg-trapped arm before settling
Roll toward the attacker to stack and spin out
Is the Crucifix Choke legal in competition?
Legal in all major rulesets at all levels (IBJJF, ADCC, sub-only). Rules change — always confirm against the current official rulebook for your event.