Hissing a tempest of curses under his breath, Leylek can feel his weight was indeed behind his strike – even as it sinks uselessly into a cloud of emptt vapour, with no foe underneath to suffer for it. The enemy is elsewhere, dousing the halo that burned around Shimura-sama a mere moment ago. BUt it doesn't matter: he could still see what he saw. It is not yet over.

With resolute wingbeats, he climbs once more, to prepare for another run.

Spoiler: OOC
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With the Cobra Steps 5' flight, the bird cannot attack right now, but he can now get out of reach with a single Tumbling withdraw: (1d20+14)[33].

Next round the charm, maybe? Until then, Dodging some more for AC 21.