Young Deep Dragon

Large Dragon, Typically Neutral Evil
Armor Class 16 (natural armor)
Hit Points 93 (11d10 + 33)
Speed 40 ft., burrow 20 ft., fly 80 ft., swim 40 ft.
STR
18 (+4)
DEX
13 (+1)
CON
16 (+3)
INT
12 (+1)
WIS
14 (+2)
CHA
16 (+3)
Saving Throws Dex +4, Con +6, Wis +5, Cha +6
Skills Perception +5, Persuasion +6, Stealth +7
Damage Resistances poison, psychic
Condition Immunities charmed, frightened, poisoned
Senses blindsight 30 ft., darkvision 150 ft., passive Perception 15
Languages Common, Draconic, Undercommon
Challenge 5 (1800 XP)     Proficiency Bonus +3
ACTIONS
Multiattack.
Bite.
Claw.
Nightmare Breath (Recharge 5-6).

This full creature's stat block is not available (not OGL).

Fizban“s Treasury of Dragons
Young Deep Dragon