Rolling for sanity loss would depend on the bio specialities and AP's but you either roll 1d or 2d and then see what the roll correlates too, these debuffs or sanity effects, can be compulsed to eat everything around them, or hearing undiscerned voices.
they is 2 ways to regain sanity first and the hardest is to stand still which in combat is harder to achieve, the second is a bios speciality's they regain 3 sanity a turn per one.
The way the roll works for chaotic rolls is 0-33 is nothing, 34-66 is 20+, 67-100 40+ and then roll for strength and weaknesses as it is a technique from the void.
(Dōjutsu: Shōgai Genjitsu) - Eye Technique: Reality Rift
Type: Offensive, Defensive, Supplementary
Rank: S
Range: Short - Long
Chakra: 50
Damage: 100 (+Chaos) (-20 Health Points)
Description: This technique is the Cosmic variant of Shimmering Depth, the basic application of the Shinkaigan’s Spatial powers. It is cast by the right eye, able to call energy directly from the Void to weaponize it. The energy manifests from the user’s eye with a long-range reach. Reality Rift is a honed version of Shimmering Depths, affording the user significantly greater control over the Void and Chaos. While it is manifested at the user’s eye the yare able to shape the energy with far greater versatility, using it as a sword, stream, projectile, or other shapes the user might require in a specific instance. Because of its unpredictable nature, Reality Rift inherits random elemental weaknesses and strengths. It also gains a 50% chance to randomly increase its damage by 20 or 30. Experiencing Reality Rift directly, meaning sensing it through either one of the primary senses, or through extrasensory means, causes one to suffer from a 10 Sanity reduction. Spatial specialists are able to apply an advanced use of Reality Rift whereby they make an additional roll that grants the technique a 33% chance to adopt neutral strengths and weaknesses, regardless of the original Chaos roll, cause the opponent’s next technique to adopt random basic strengths and weaknesses (if applicable), or heal the user for forty Health Points. Advanced applications cost the user 20 Health Points.
Note: Rift in Reality can be used three times per battle, with three turns between usage.
Note: After use the user is unable to use Spatial Shinkaigan techniques for a single turn.