Swiftwing

One willing creature you touch assumes a mist-like form for the duration, appearing like frosted breath. While in this mist form, a creature has a flying speed of 150 feet and has resistance to damage from nonmagical weapons. Whilst in mist form a creature can only take a dash action or revert back to their original form. Reverting takes 1 action. Until the spell ends, a creature can revert to mist form, which also requires the 1-action transformation.

If a creature is in cloud form and flying when the effect ends, the creature descends 60 feet per round for 1 minute until it lands, which it does safely. If it can't land after 1 minute, the creature falls the remaining distance.