Cleon
Legend
I don't think I want the whole swarm sticking to the victim in this case. Doesn't feel right for leeches. But I do like the rot grub style stickiness. Maybe 1d4 leeches?
That seems too few, I'd like there to be enough to create a noticeable drain after a few rounds. Maybe 2d6 or 1d10?
Besides, they're a lot less nasty than rot grubs.