[@KoL] Yes, I know how math works. I understand the logistics behind exponential growth. I'll thank you not to patronise me as if I'm stupid. My problem isn't with understanding how the ability functions; it's why you the GMs think an ability that has an exponentially larger area of effect over time, with no extra energy input from the creator beyond the initial offering (and as Silvan points out, no stated method regarding how it gathers energy to grow in that exponential pattern), and which is on its own strong enough to kill every enemy PC, is not in any way "broken". Maybe it is technically legal by the game's rules, but for some reason, I highly doubt you'd let any bog-standard player have an ability which was anything like as devastating as Victoire's blood roses.

Moreover, there seems to be an assumption on your part that players [i]should[/i] be forced to build their own characters in a manner that actually lets them counteract an ability like this, in particular to handle the manner in which it's deployed. The specific build they'd need involves... well, running it through my head, I'd say easily-repeated teleportation, some form of cleansing aura strong enough to erase all the roses in an area that may or may not be very small, a very wide-ranging detection ability that lets them sense demons and demonic constructs so that they know where Victoire and the roses are to begin with, and most likely abilities specialised toward countering Victoire's moves such as anti-teleportation. Those are all pretty specific powers, and lacking even one means the character cannot stop the roses alone, either because they lack the means to do so outright, or because to do so would involve metagaming that I can only imagine would be slapped down immediately; I could write up an example sheet for such a character, and it may be that a teleporter could gather a team of characters with those powers in tow, but at the end of the day, it's a lot of effort to go through to stop one character from winning every fight for their faction.

[@Silvan Haven][@Lonewolf685] Technically, Victoire is still in the game as a PC right now. And I am trying to be as civil as I can about this. I'm not flinging insults around or anything, merely voicing my thoughts.