Hey GitP forums, first post looking for feedback on a homebrewed alchemist discovery I created. It's being used by a character that already has a glide speed at ecl 5, but I also want opinions for general use. Constructive feedback wanted.
Sustained Flight (su)
Requirement: Wings discovery or gliding wings racial ability
With this discovery you harness elemental air by alchemical means to allow you to take greater advantage of your wings. When you take this discovery, many small pores become visible on your body which slowly emit mist, an effect which intensifies as you use this discovery to fly, leaving thin streamers of mist in your wake.
When you take this discovery you gain a fly speed of 60 feet with clumsy maneuverability (-8 to fly checks) and additional restrictions. You must take a running start or jump from some distance of height to become initially airborne, and cannot ascend more than a quarter of your fly speed (15 feet probably) in one round. While using any other means of flying or gliding without aid from this discovery, your maneuverability is not affected negatively by this discovery.
In addition you gain the ability to remain airborne for long periods of time; gliding is effectively effortless and maintaining altitude while flying at your fly speed each round is no more strenuous than a walking pace on land. Gaining altitude is not made easier by this discovery.