Belephaion

Large Dragon, Lawful Evil

Armor Class 18 (natural armor)

Hit Points 152 (16d10 + 64)

Speed 40 ft., fly 80 ft., burrow 20 ft.

STR

DEX

CON

INT

WIS

CHA

Saving Throws DEX +4, CON +8, WIS +5, CHA +7

Skills Perception +9, Stealth +4

Damage Immunities lightning

Senses blindsight 30 ft., darkvision 120 ft., passive Perception 19

Languages Common, Draconic

Challenge 9 (5,000 XP)

Actions

Multiattack. Belephaion makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit:16 (2d10 + 5) piercing damage plus 5 (1d10) lightning damage.

Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit:12 (2d6 + 5) slashing damage.

Lightning Breath (Recharge 5–6). Belephaion exhales lightning in a 60-foot line that is 5 feet wide. Each creature in that line must make a DC 16 Dexterity saving throw, taking 55 (10d10) lightning damage on a failed save, or half as much damage on a successful one.

Alter Shape. Belephaion magically transforms into an eagle or a priest, while retaining his alignment, damage immunities, hit points, Hit Dice, and Intelligence, Wisdom, and Charisma scores. This transformation ends if he is reduced to 0 hit points or uses a bonus action to end it.