Serpentine Body. When the Spirit Dragon makes an ability check or saving throw that uses Dexterity, it can add your Wisdom modifier to the result.
Spectral Slash. Melee Weapon Attack: your Shaman spell attack modifier to hit, reach 5 ft., one target. Hit: 1d4+4 + PB slashing + 1d4 necrotic damage. Spirit Breath. The Spirit Dragon can expend a Primal Magic spell slot to exhale pure spiritual energy in a 30 ft. cone, forcing creatures in that area to make a Dexterity saving throw. They take necrotic damage equal to twice the damage of your Totemic Assault on a failed save, and half as much on a success.