Re: John|Jean
I was born with Telepathy and Telekinesis. If I let out the Phoenix Force, my powers are magnified, including matter manipulation on atomic level, teleportation, and immortality.
Those are the most prominent of my powers.
I would use my matter manipulation to make a grave air tight. Then I'd recover the grave with it's natural over growth.
Since you can cast spells, you could cast one where only you could open it.