Deathsting Shift (Shifting)

Benefit: You grow a tail , aiding in your balance. You gain a +2 bonus on Acrobatics checks for each Shifting feat you possess. This shift lasts for 1 hour. However, if you reduce the duration to 2 rounds you gain a sting attack, which functions as a primary natural attack dealing 1d4 damage for a Medium creature. The stinger contains a poison that deals 1d2 points of Strength damage once per round for 6 rounds. The Fortitude Save DC is 10 + 1/2 your character level + your Constitution modifier +1 per Shifting feat you possess. This shift lasts for 2 rounds.
Special: At 3 Shifting feats, your tail grows more powerful, functioning as a third arm in many ways. You
can use your tail to grab unattended items within 5 feet as a swift action as well as to grab stowed objects carried
on your person; you can hold such objects with your tail, though you cannot manipulate or wield them with your
tail (other than to put them in your hand). When making a 2 round shift, you may use your sting attack against
enemies 5 feet further away. You may still use it to attack adjacent enemies. Additionally, your poison now deals
2d2 Str damage per round.
At 5 Shifting feats, your tail acts as third “hand” that you can use for anything a normal hand could be used for. This does not give you any extra attacks or actions per round, though it can wield weapons and make attacks as part of your attack routines just like a normal hand (you merely cannot attack with a third weapon). The “hand” can manipulate or hold items just as well as your normal hands (for example, allowing you to use one hand to wield a weapon, another hand to hold a potion, and the third hand to hold a shield). When making a 2 round shift, when you hit an opponent with your sting, you may attempt a reposition combat maneuver as a free action without provoking an attack of opportunity, but you must reposition the target closer to you than where they were when you started the reposition maneuver. Additionally, your poison now deals 3d2 Str damage.