Tortimer is a 10th-level spellcaster. His spellcasting ability is Wisdom (save DC 16, +8 to hit with spell attacks).

Guidance, Sacred Flame, Spare the Dying, Thaumaturgy

Mass Cure Wounds, Death Ward, Guardian of Faith

Aura of Vitality, Life Transference, Revivify, Spiritual Weapon

Enhance Ability, Lesser Restoration, Bane, Healing Word, Sanctuary

Circle of Mortality. If using a healing spell on a creature with 0 hit points, Tortimer instead restores the maximum possible value of the roll.

Potent Spellcasting. Tortimer adds his Wisdom modifier (+4) to any damage roll made from a cantrip.