Don't laugh. It works!
Only few martial artists are versed in the way of the crab. It is rumored to be especially effective against the Crane Fist Style.
Level 3
Pincer Style.
Your unarmed strikes gain On Crit: Grappled.
(1/turn) You may suffer 1 wound to gain advantage on an attack.
Level 7
Carapace.
Gain STR Armor.
Crab Dance.
Whenever you defend (after taking damage): You may move up to half your speed.
Level 11
Shellbreaker.
Attacking with advantage ignores armor.
Level 15
Crab Rave.
Whenever you Crab Dance an ally gains 1 Burst of Speed.