a deep black onyx coffin set with delicate pink erythrite roses

You focus your magical senses on a deep black onyx coffin set with delicate pink erythrite roses.
The onyx coffin has a definite magical pattern, which is apparently a spell.
You recognize the pattern as a manifestation of Holy magic.
It seems to involve Spirit Manipulation.
The pattern appears to be the Rejuvenation spell.
There is a weak point in one of the lines of energy, which will hold for 6 more uses.
The lines are of moderate width, and they glare with brilliance.