"The X-Soul is the shared soul between Cross Sans and Cross Chara, the red part being Determination while the white part being Sans's soul." —Narrator
X-Soul is an item from X-Tale, a Undertale AU series made by Jael Peñaloza. X-Soul is an B Tier item; the tier list is here
How To Obtain
The X-Soul can currently be obtained from Chests that spawn around the map or itself spawn.
Dialogue (When using X-Soul on Sans)
- Sans: So you're getting rid of me...