Medium Dragon, Chaotic Evil
Armor Class 18 (natural armor)
Hit Points 88 (8d8 + 16)
Speed 30 ft., burrow 15 ft., fly 60 ft.
STR
17 (+3)
DEX
10 (+0)
CON
15 (+2)
INT
18 (+4)
WIS
18 (+4)
CHA
15 (+2)
Saving Throws DEX +2, CON +4, WIS +6, CHA +4
Skills Perception +8, Stealth +2
Damage Resistances Radiant
Damage Immunities Necrotic
Condition Immunities Frightened, Poisoned
Senses Blindsight 10 ft., Darkvision 60 ft., Passive Perception 18
Languages Celestial, Draconic
Challenge 4 (1,100 XP)
Proficiency Bonus +2
Actions

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d10 + 3) piercing cdamage plus 3 (1d6) lightning damage.

Abyssal Breath (Recharge 5–6). The dragon exhales a stream of necrotic energy in a 30-­foot line that is 5 feet wide. Each creature in that line must make a DC 12 Dexterity saving throw, taking 22 (4d10) Necrotic damage on a failed save, or half as much damage on a successful one.

 Draconic Bane (Recharge 19-20). One creature of your choice that you can see within range must make a DC17 Charisma saving throw. Whenever a target that fails this saving throw makes an attack roll or a saving throw before the spell ends, the target must roll a d4 and subtract the number rolled from the attack roll or saving throw.

Reactions

Draconic visions. Once per long rest when a creature fails its save, as a reaction roll a D20 and substitute the new roll for any saving throw. 

MikeDebuffalo