Dirge of the Dragonlords

You return a dead dragon that has been bonded to a dragonlord back to life. The target returns to life with 1 hit point. The target's severed body members (fingers, legs, tails, and so on), if any, are restored after 2 minutes. If you have the severed part and hold it to the stump, the spell instantaneously causes the limb to knit to the stump. This spell also neutralizes any poisons and cures nonmagical diseases that it is afflicted with. This spell doesn’t, however, cure magical diseases, remove curses, or similar effects; if these aren’t first removed prior to casting the spell, they take effect when the dragon returns to life.