Yamato

Abjuration/Divination Casting Time: 1 action Range: 30 feet Components: V, S, M (a small silver bell) Duration: 10 minutes Effect: You invoke a sacred blessing of harmony upon a pair of individuals, whether newlywed lovers, sworn siblings, or lifelong companions. For the duration: The two chosen creatures gain advantage on saving throws against effects that would charm or frighten them. If they stand within 30 feet of each other, they may share hit points once during the duration, transferring up to their level in HP between them. If used during an actual wedding or oath ceremony, the spell lingers for 24 hours, granting the couple 1d4 bonus to Persuasion and Insight checks when interacting with each other.