Master Healer
You possess tremendous skill in the healing arts.

Self-Sufficient, Skill Focus (Heal), or Healing domain.

Immediately after an encounter ends you may make a Heal check to "patch up" a creature's wounds. Any amount of lethal damage suffered by that creature (to a maximum of your check result) is converted to nonlethal damage, thereby healing much more quickly. You may tend to up to 8 creatures in this way, taking one minute per creature.

Whenever you cast a Conjuration (Healing) spell on a creature, all lethal damage suffered by that creature is converted to nonlethal damage. This applies even to spells that do not heal hit points e.g. lesser restoration.