Im not sure Baali need more help, but id expect thier tempting to have more to do with them owning someones free will more than causing infernalism being the target.
Obvious candidates are somewhat similar to some of the ancillary uses for Corruption counter (either actual ones or commonly suggested ones). Things like Neferu's vote change special, Kahina's damage special, or Nakhthorheb's unblockable special. Suggestions to do similar-ish things with library cards aren't unheard of, and we already have Revelation of Desire.
So you could be doing things like:
- changing votes
- giving them negative intercept against [some minions] (say, Baali, infernals, my Baali, whatever.)
- making [some minions] unblockable by these guys
- card or action cancellation (needs to be
very carefully balanced, of course)
- bleed bounce (also needs to be carefully balanced, semi-permanent bounce could get hellish)
The major difficulty being that if the downside is too harsh for a given deck, it won't voluntarily do the thing. Whereas if the downside is trivial for a given deck, you may have given it a boost. (This would potentially be bad play, of course, but it's potentially also bad design.)
So you would probably need to find a sweet spot where the Bad Thing wasn't too bad, or maybe gradually ratchets up (and an optimistic player can be thinking "But the game will be over in three turns!"), or that sort of thing.
Offers of needed power - Baali corruption card
