This information taken from the original post by mDiyo
Original idea for the mod belongs to him, I have merely ported it to 1.7 and added some configs.
This is a little mod that was created for the Ultra Hard Survival pack. The goal is to fill the gaping hole that is early-game regeneration with a limited item. It's not spammable, but until you get potions it is your only option for healing.
Prayer to Notch recipe:

Some info on the item:
No files available for download.