Human: Write a detailed character description for a DnD game of a Feral Bone Mastiff a type of undead animal Assistant: 
Picked clean of all fleshy tissue by buzzards, maggots, or a combination of both, the skeletal hulk of a mastiff rises tall before you. Its feral canine body is unnaturally elongated and twisted into exaggerated knots, likely by the same force that animates it beyond Eylhaar's embrace. A sickly green light glistens within its empty eyesockets, a sign of its foul pact with some Necromantic entity.