You turn a semi transparent grayscale and resemble a Wereraven. For the duration of the spell  (1 minute/10 rounds), you regain 5 hit points at the start of each turn (up to 50). You are are immune to death unless the killing blow occurs when a piece of pure silver is in your heart OR your entire body is destroyed (pool of lava, etc).

Your severed body members (fingers, legs, tails, and so on), if any, regrow over the course of 30 seconds (regrowth continues beyond the end of the duration UNLESS the part is again damaged after effect ends). If you have the severed part and hold it to the stump, the spell instantaneously causes the limb to knit to the stump.