PSA: Multi-kill limit.

[radioactive_lego]

I dont think so. We tested with Circle of Scorn (and other DoTs) and the skills/spells would only infect a maximum of 16 mobs, even if their deaths were not instantaneous. I'm thinking there's a limit on how much any skill/spell/action can "spread", and that limit is 16 mobs ant any one time.

As for being an oddly arbitrary number; well, no. It makes a little sense. The enemy list has a maximum of 8, and 16 is double that.