Morgan: your answer re: venomous makes sense, but what about the aspects vs environmental damage? And sure, 3 refresh for a power should be nasty, no doubt, but the rules should be consistent, and as I point out below, they aren't.
Babel: first, I have two words for you. Paragraph breaks. :-)
Second, I suppose so, but it drives me nuts, because essentially they have three different rules for when a continuous damage event occurs:
1. It's from venomous claws. Take continuous damage.
2. It's from the environment. Take continuous damage.
3. It's from a character - get compelled, invoked, tagged, whatever, but regardless dont take continuous damage.
My setting them on fire, or the building for that matter, should be no different than if The environment does it. It's different rules for different situations for basically the same thing.
You don't want to power venomous though... I will probably make some rule that allows someone to sacrifice shifts to add appropriate ongoing damage. Like, 2 shifts, then rest of shifts becomes an ongoing attack until removed... or 2 shifts per 1 shift of ongoing attack or something... and something similar for enviromment, with an additional charge for effecting the zone as normal.