I was just looking to get some opinions and feedback on a house rule I've been mulling over. It hasn't yet happened during a game session, but it is something one of my players had mentioned outside of the session.
The rule is; instead of being capped at 5 difficulty dice for additional magic effects, each additional effect upgrades a difficulty die by the number of difficulty die to would have added. With the new magical dice pool limit being 5 challenge dice.
I was worried about this at first, but the more I thought about it the cooler it sounded. Threat and Despair is so dangerous to magic users that I think it balances itself. I love the idea of a spellcaster knocking themselves out from pushing their magic too far.
I'm curious if anybody has done something similar, or if this sounds like it could break the game. Should i put more limits on it? Like say... they have to flip a story point to access this super magic?