Flight is an ego which grants you the ability to begin flying at will. This provides all the normal benefits and disadvantages of the flight status effect, and unlike other sources of flight has no time limit; you may end it whenever you so choose, but the only way for it to end prematurely is for you to become polymorphed or otherwise forced to remove the ego equipment.
Cost: 1 MP, 100-200 nutrition
Success Rate: When 60+2*Evocations > 3d100/3
Flight can be found on:
Bear in mind that the similarly named ring of flight functions differently, ending after a certain amount of time has passed.