The Brooklyn man who allegedly ignited a fatal apartment blaze during a who’s-your-voodoo-daddy sex romp had liked to brag to neighbors about possessing magical powers.

Nelson “Pepe” Pierre, 66, claimed “he could turn people into ghosts, move buildings, turn people into buildings,” said Patrick Louis, who also lived in the East Flatbush building. “But that day, I guess, he couldn’t turn that fire out.”