Around Avita, a flutter of dark wings gather as she chants something about claws of the night coming unto her and welcoming as the break of day, or something suitably silly. Then she looses her Bat swarm into the Hybrids climb the tower.

[Bat swarm can hit 4 Hybrids for 1d6 damage each.

(1d6)[2]
(1d6)[4]
(1d6)[3]
(1d6)[6]

Any Hybrid wounded must take a DC 11 Fort Save or become Nauseated for one round.

Any Hybrid wounded must take 1 hp damage per turn until it makes a DC 10 heal check to staunch the bleeding.

And here's where we find out if they have damage reduction.]