You gain a +2 bonus on Sense Motive checks, and you can deal piercing damage with your unarmed strikes. While using Snake Style, when an opponent targets you with a melee or ranged attack, you can spend an immediate action and 3 TP to make a Sense Motive check. You can use the result as your AC or touch AC against that attack. You must be aware of the attack and not flat-footed.
You gain a +4 bonus to CMD against trip combat maneuvers and on Acrobatics checks and saving throws to avoid being knocked prone. While using Snake Style, whenever you score a critical threat with your unarmed strike, you can make a Sense Motive check in place of the attack roll to confirm the critical hit. Whenever you score a critical hit with your unarmed strike, you can spend an immediate action to take a 5-foot step even if you have otherwise moved this round.
While using Snake Style, when an opponent’s attack misses you, you can make an unarmed strike against that opponent as an attack of opportunity. If this attack of opportunity hits, you can spend an immediate action to make another unarmed strike against the same opponent.