Fulminar

Large Elemental neutral

STR	DEX	CON	INT	WIS	CHA
10 (+0)	20 (+5)	14 (+2)	8 (-1)	17 (+3)	10 (+0)

Saving Throws: Dex +9, Cha +4
Skills: perception +7, stealth +9
Damage Immunities: poison
Damage Resistances: lightning, thunder; bludgeoning, piercing, and slashing from nonmagical attacks
Condition Immunities: exhaustion, grappled, paralyzed, petrified, poisoned, prone, restrained, unconscious
Senses: darkvision 120 ft., passive Perception 17
Languages: Auran

Flyby: The fulminar doesn't provoke an opportunity attack when it flies out of an enemy's reach.
Essence of Lightning: Bolts of lightning course around the fulminar's body, shedding bright light in a 5- to 20-foot radius and dim light for an additional number of feet equal to the chosen radius. The fulminar can alter the radius as a bonus action.
Lightning Form: The fulminar can enter a hostile creature's space and stop there. It can move through a space as narrow as 1 inch wide without squeezing. A creature that touches the fulminar or hits it with a melee attack while within 5 feet of it takes 7 (2d6) lightning damage.

Multiattack: The fulminar makes three attacks: one with its bite and two with its claws.
Bite: Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) piercing damage and 7 (2d6) lightning damage and the target can't take reactions until the end of the fulminar's next turn.
Claw: Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage and 7 (2d6) lightning damage.
Lightning Shackles (Recharge 5-6): The fulminar magically creates three sets of shackles of lightning, each of which can strike a creature the fulminar can see within 60 feet of it. A target must make a DC 16 Dexterity saving throw. On a failure, the target takes 18 (4d8) lightning damage and is restrained for 1 minute. On a success, the target takes half the damage but isn't restrained. A restrained creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.