I have been waiting for this scene for YEARS. It hasn’t always taken this form (originally it took place in the Tower Room against the Shadow), but Percy using the zappy to defend himself and his friends has remained consistent.
I went back to hand-drawing the comic, then going over the lines digitally, and I am pleased with the result. It also theoretically takes less time this way. I say theoretically because I got back from Japan last week and jet lag is still hitting hard; I fell asleep at my computer desk twice while inking this comic. Oops!