Erebos’ Reliquary

Hexproof
{t}: Add {b}
{1}, {t}: Add X black mana to your mana pool,
where X is your devotion to black.
At the beginning of your turn, if your devotion
to black is ten or more, until the end of your
turn, whenever a black permanent you control
enters the graveyard, return that permanent to
the battlefield tapped.