#Cloud Ray Elder
Gargantuan monstrosity, unaligned

 

Armor Class - 16 (natural armor)
Hit Points - 437 (25d20 + 175)
Speed - 20 ft., fly 60 ft. (hover)

 

STR - 26 (+7)
DEX - 18 (+4)
CON - 26 (+7)
INT - 4 (-3)
WIS - 27 (+8)
CHA - 8 (-1)

 

Damage Immunities - thunder, lightning
Condition Immunities - prone, stunned, paralyzed
Senses - Passive Perception 17
Languages - -
Challenge - 16 (15,000 XP)

 

##Traits

 

###Flat Body.
Creatures can enter and end their turns in the same space as the cloud ray elder.

 

###Undulating Winds.
Any creature that starts its turn within 15 ft. of a cloud ray elder takes 10 (3d6) thunder damage, and it pushed 15 ft. to another space still within 15 ft. of the cloud ray elder.

 

###Gaping Maw.
Any creatures grappled by a cloud ray elder are dragged with it wherever it moves, and do not cause any form of hindrance to movement.

 

##Actions

 

###Multiattack.
The cloud ray elder makes a sting, and thunder lash attack.

 

###Sting.
Melee Weapon Attack: +12 to hit, reach 25 ft., one target.
Hit: 18 (2d10 + 7) thunder damage and the target must make a DC 17 Constitution save, or suffer 11 (2d10) lightning damage at the start of each of its turns. The target may attempt this saving throw again at the end of each turn. If the target fails their saving throw by 5 or more, they are also paralyzed.

 

###Thunder Lash.
Melee Weapon Attack: +12 to hit, reach 25 ft., one target.
Hit: 29 (4d10 + 7) thunder damage and all creatures within 25 ft. of the target are pushed 15 ft. away from the primary target taking 25 (4d8 + 7) thunder damage, or half as much on a successful DC 17 Constitution save.

 

###Scooping Bite.
The cloud ray elder swoops down, its mouth agape in an attempt to grab as many creatures as possible. All creatures within a 25 ft. radius must succeed on a DC 17 Dexterity save, or take 23 (3d10 + 7) bludgeoning damage. All huge or smaller targets that fail their saving throw are grappled. The cloud ray elder can have up to three creatures grappled in its mouth at one time.

 

###Gliding Menace (Recharge 5-6).
To use this action the cloud ray elder must fly at least 60 ft. during its turn. The cloud ray elder uses the thunder lash, scooping bite, and sting actions. Each action is used during a different point in its movement. It does not provoke attacks of opportunity this turn.

 

##Bonus Actions

 

###Crush.
As a bonus action the cloud ray elder crushes any creatures it might have grappled in it’s massive jaws.
Melee Weapon Attack: +12 to hit, all targets grappled.
Hit: 29 (4d10 + 7) bludgeoning damage.

 

###Dream Flight (1/Long Rest).
As a bonus action, the cloud ray elder teleports up to 75 ft., taking with it any creatures it has grappled. Any creatures within 10 ft. then take 19 (2d10 + 8) psychic damage, or half as much on a DC 17 Wisdom save. Any creature who fails this save is also stunned. They are allowed another saving throw at the start of each turn to recover recover.

#Cloud Ray Elder
Gargantuan monstrosity, unaligned

Armor Class: 16 (natural armor)
Hit Points: 437 (25d20 + 175)
Speed: 20 ft., fly 60 ft. (hover)

STR - 26 (+7)
DEX - 18 (+4)
CON - 26 (+7)
INT - 4 (-3)
WIS - 27 (+8)
CHA - 8 (-1)

Damage Immunities: thunder, lightning
Condition Immunities: prone, stunned, paralyzed
Senses: Passive Perception 17
Languages: —
Challenge: 16 (15,000 XP)

##Traits

Flat Body. Creatures can enter and end their turns in the same space as the cloud ray elder.

Undulating Winds. Any creature that starts its turn within 15 ft. of a cloud ray elder takes 10 (3d6) thunder damage, and it pushed 15 ft. to another space still within 15 ft. of the cloud ray elder.

Gaping Maw. Any creatures grappled by a cloud ray elder are dragged with it wherever it moves, and do not cause any form of hindrance to movement.

##Actions

Multiattack. The cloud ray elder makes a sting, and thunder lash attack.

Sting. Melee Weapon Attack: +12 to hit, reach 25 ft., one target.
Hit: 18 (2d10 + 7) thunder damage and the target must make a DC 17 Constitution save, or suffer 11 (2d10) lightning damage at the start of each of its turns. The target may attempt this saving throw again at the end of each turn. If the target fails their saving throw by 5 or more, they are also paralyzed.

Thunder Lash. Melee Weapon Attack: +12 to hit, reach 25 ft., one target.
Hit: 29 (4d10 + 7) thunder damage and all creatures within 25 ft. of the target are pushed 15 ft. away from the primary target taking 25 (4d8 + 7) thunder damage, or half as much on a successful DC 17 Constitution save.

Scooping Bite. The cloud ray elder swoops down, its mouth agape in an attempt to grab as many creatures as possible. All creatures within a 25 ft. radius must succeed on a DC 17 Dexterity save, or take 23 (3d10 + 7) bludgeoning damage. All huge or smaller targets that fail their saving throw are grappled. The cloud ray elder can have up to three creatures grappled in its mouth at one time.

Gliding Menace (Recharge 5-6). To use this action the cloud ray elder must fly at least 60 ft. during its turn. The cloud ray elder uses the thunder lash, scooping bite, and sting actions. Each action is used during a different point in its movement. It does not provoke attacks of opportunity this turn.

##Bonus Actions

Crush. As a bonus action the cloud ray elder crushes any creatures it might have grappled in it’s massive jaws.
Melee Weapon Attack: +12 to hit, all targets grappled.
Hit: 29 (4d10 + 7) bludgeoning damage.

Dream Flight (1/Long Rest). As a bonus action, the cloud ray elder teleports up to 75 ft., taking with it any creatures it has grappled. Any creatures within 10 ft. then take 19 (2d10 + 8) psychic damage, or half as much on a DC 17 Wisdom save. Any creature who fails this save is also stunned. They are allowed another saving throw at the start of each turn to recover recover.

How balanced is this Cloud Ray Elder Conversion given its CR?

How accurate is CR 16 for this Cloud Ray Elder conversion?