Pretty self explanatory. The basic question comes down to whether or not creatures in the graveyard count as creatures for protection.
I'm aware of DEBT, but the question is would Vengeful Pharaoh count as a creature from the graveyard?
Protection from creatures means, among other things, that the permanent or player with that ability can't be the target of abilities from creature sources wherever those sources are (C.R. 702.16b). This is an exception to the general rule that the term "creature" means a creature permanent on the battlefield (C.R. 702.16a; see C.R. 109.2 for the general rule).
I'm aware of DEBT, but the question is would Vengeful Pharaoh count as a creature from the graveyard?
EDIT (May 26): Add rule citation.
EDIT (Jun. 14, 2022): Edit second sentence.