One of my PCs is creating a character that has left her (probably mystery cult) in Ex Misc, and tried (and failed) to join House Flambeau as part of her backstory.
I cannot find a major non-hermetic virtue that I think would suit her character. Most supernatural virtues are silly XP-sinks that just replicate hermetic powers or are aligned with different realms.
Is there a major virtue (mysteries are... okay, if a bit eeeh) that would complement a character interested in Auram, Ignem, and Mentem, that is either a non-ability virtue (i.e. no XP sink) or is worth the XP investment?
She's also a new player to Ars Magica (in a group of 3 others who played a 3 year campaign with me), so I'd prefer not to introduce her to any of the major hedge magic traditions that have a completely different spellcasting system.
Bonus points for explosions.