There is a Legacy version
here.
Bestial Mutagen
Item 1+Alchemical Consumable Elixir Mutagen Polymorph Source Player Core 2 pg. 289Usage held in 1 hand;
Bulk L
Activate [one-action] (
manipulate)
Your features transform into something bestial and lumbering.
Benefit You gain an item bonus to
Athletics checks and unarmed attack rolls. You gain a claw unarmed attack with the agile trait and a jaws unarmed attack. Striking runes don't modify the damage caused by these attacks.
Drawback You take a –2 penalty to Reflex saves,
Acrobatics checks, and
Stealth checks.
Bestial Mutagen (Lesser)Item 1
Source Player Core 2 pg. 289Price 4 gp
Bulk L
You gain a +1 item bonus, your claw deals 1d4 slashing damage, your jaws deal 1d6 piercing damage, and the duration is 1 minute.
Bestial Mutagen (Moderate)Item 3
Source Player Core 2 pg. 289Price 12 gp
Bulk L
You gain a +2 item bonus, your claw deals 2d6 slashing damage, your jaws deal 2d8 piercing damage, and the duration is 10 minutes.
Bestial Mutagen (Greater)Item 11
Source Player Core 2 pg. 289Price 300 gp
Bulk L
You gain a +3 item bonus, your claw deals 3d8 slashing damage, your jaws deal 3d10 piercing damage, and the duration is 1 hour.
Bestial Mutagen (Major)Item 17
Source Player Core 2 pg. 289Price 3,000 gp
Bulk L
You gain a +4 item bonus, your claw deals 4d8 slashing damage, your jaws deal 4d10 piercing damage, and the duration is 1 hour. You gain weapon specialization with the claw and jaws, or greater weapon specialization if you already have weapon specialization with these unarmed attacks.