Necklace of Awakening

Burial Plot
Necklace of Awakening comes into play tapped.
{t}: Add {c} to your mana pool. If Necklace's
Burial Plot is occupied, instead add {b}.
Creatures buried in Necklace have Burial Rite
{b}: Exile this creature. Necklace becomes a copy
of that creature, except it keeps Burial Plot, is a
Demon, and gains "If this creature would be
killed, Necklace ceases to be a copy instead."
(The exiled creature remains exiled.)