As it turns out, self sustained flight is just a tad more complicated that simply spreading your wings, or in this case a feathered cloak, and hoping for the best. Who would have thought of that?
What Corvus was doing now could be called, at best, gliding. But even that was somewhat of a stretch with his lack of speed, balance and general control. The wing was absolutely catching his feathered cloak, don't be mistaken, but it was absolutely horrendous to control. No one thought to put a steering wheel on the damn thing.
Since he couldn't fly and could only partially glide, with some difficulties, Seth resorted to graciously allowing Corvus to do the next best thing.
Folding in his cloak, Corvus pointed his beak towards and plunged into a dive, tilting his body left and right to steer himself. Every second or so during his free fall, he would flip out his cloak and let it catch the air, rapidly slowing him down, before plunging into a fall once again.