Alright Tavern-goers, I need a little help designing a move!

Alright Tavern-goers, I need a little help designing a move!

Alright Tavern-goers, I need a little help designing a move! While working on a 1-shot for a group I’m GMing this weekend I came up with the idea that some of the enemies I’d like to include will be spirits that feed off connections to the divine/spiritual realm. To this end I wrote this move:

when you use spiritual/divine magic in the presence of a maddened spirit roll-wis. On a 10+ you get a strange feeling but are otherwise unaffected. On a 7-9 the spirit drives you closer to the brink, lower your wisdom by 1 (cumulative) until you are able to reestablish a safe connection to the spirits/gods. At 0 wisdom you are driven beyond

rationality as the spirits’ feral desire takes over your body, take your last breath.

Reading through the move a few times however I’ve come to 2 conclusions. 1. the move seems EXTREMELY difficult to succeed at, since modifiers are reversed (rolling minus a stat). 2. Because of this, I’m having a hard time coming up with a “fair” 7-9 result.

My first instinct is to move the 10+ result down to 7-9 and add a positive effect to the 10+ (maybe something like +1 forward acting against the spirit) and move the 7-9 “madness” effect to happen ona 6-. What do you guys think?? All opinions welcome!