#d&d system

thinking about building a d&d system that combines call of cthulu and d&d to make basically normal d&d but sanity rolls. If you fail, for whatever reason, the DM gets to choose a repercussion (not like long-term madness, but more like flashbacks/trauma). The key element of this would be, especially in battle, characters can 'snap', which makes them immensely violent, and they get a 'snap' tag (or something of the likes- I'm still cooking). snap tags will affect your character, but the primary point is that your actions have severe mental consequences. Watch me go down a PTSD/therapy rabbit hole to make this. let me cook