Quicksilver Mutagen

Benefit: Acrobatics, Stealth and Thievery checks,
Reflex saves, Dex attack rolls and speed.
(1) Lesser +1 bonus and 5ft duration 1 min
(3) Moderate +2 bonus and 10ft duration 10 min
(11) Greater +3 bonus and 15ft duration 1 hour
(17) Major +4 bonus and 20ft duration 1 hour

Drawback: Loose twice your lvl in hp and
gain -2 penalty to Fortitude saves while active.