Found in Irithyll of the Boreal Valley.
From the Church of Yorshka, make way until reaching the open area with the lake surrounding the city. Proceed into the waters and look for a semi-secluded area on the far right. The spell can be found on the dead body of a Man-grub.
Restores a large amount of HP to the caster and to allies close to them. In terms of restorative miracles, it is superior in every way to Med Heal, but is eventually outclassed by Soothing Sunlight once it is obtained and able to be used.