D&D 5E ideas for an attack on an airship / making the next adventure fun

[Krakenspire]

Urds.... lots of urds that just fly over and drop rocks, and ceramic jars filled with poisonous creatures, and green slime which eats through the airship holing it.

Gargoyles are always fun.

Giants throwing rocks at the ship in a great game! Giants throwing gnolls at the ship in a great game!