Huge undead, Neutral
Hit Points: 60 (7d10+21)
STR16(+3) DEX 12(+1) CON 16(+3) INT 6(-2) WIS 7(-2) CHA 5 (-3)
Senses: Darkvision 100'
Languages: Understands Common
Multiattack: Battle-Bones makes one claw attack and one bite attack
Melee Attack- Bite +3 to hit (reach 10'; one creature). Hit 8 (1d10 +3) piercing damage
Melee Attack-Claw: +3 to hit (reach 5'; one creature) Hit: 6 (1d6+3) Slashing damage
Immunities: Battle-Bones is immune to disease and poison. It cannot be frightened or put to sleep. Battle-Bones does not need to sleep, eat or breathe.
Damage Vulnerabilities: Bludgeoning
The beasts rib-cage has been magically altered to allow a rider to ride "comfortably". Battle-Bones can transport up to 12 medium-sized humanoids without suffering any encumbrance or movement penalties. .
The product of necromantic magic, Battle-Bones is the animated skeleton of a huge reptile from a forgotten age that has been turned into an unrelenting tireless combat transport, that needs neither, food, water or rest.
Use of a handy "Speak with Dead" spell perhaps?