Quanta cura a habilidade da Escola Necromacy faz?

Healing Grace (Su):

Whenever you cast a spell that has targets, affects creatures in an area, or requires an attack roll, you may heal creatures affected by the spell a total of 1 point of damage per level of the spell. This healing may be spread out between the targets of the spell in any way you choose. If you assign any of the healing to an undead creature, it instead takes 1 point of damage for each point assigned. At 11th level, the amount of damage cured increases to 2 points of damage per level of the spell. This healing occurs when the spell is cast and has no effect on creatures that enter its area after the spell is in place. At 20th level, the amount of damage cured increases to 3 points of damage per level of the spell.

O que, "pode curar as criaturas afetadas pela magia um total de 1 ponto de dano por nível da magia"? Esse nível literal de magia?

EX: Cantrips = 0 HP, 1º Nível = 1 HP, 2º Nível = 2 HP, 3º Nível = 3 HP, etc ....

ou dados de dano?

Ex: cure com Shocking Grasp (max 5d8) = 5 HP, Fireball (Max 10d6) = 10 HP

ou 1 para 1 de dano por dado por nível de magia?

Ex: cura com Aperto Chocante = 5d6 HP, Bola de Fogo = 10d6 HP