Marcelo Garcia Complete Butterfly Guard Vol 2: No Underhook
Marcelo Garcia's butterfly answers with no underhook: collar-tie and triceps sweeps, straight armbar, snap-and-pull guillotine, and double-overhook clamp. Built on a jab mentality: the collar-tie and triceps cups are one-beat sweeps, the straight armbar comes when they post, the guillotine comes off a fake lift, and the double-overhook clamp sweeps either direction with one grip.
This public BJJ flow maps techniques and transitions.