Sources
CR
Type
Size
Alignment
Movement

Karavarix

Huge Undead, Chaotic Evil

Armor Class 16 (natural armor)
Hit Points 230 (20d12 + 100)
Speed 40 ft., fly 80 ft.
STR
23
+6
DEX
10
+0
CON
20
+5
INT
11
+0
WIS
14
+2
CHA
10
+0
Saving Throws DEX +5, WIS +7
Skills Perception +7, Stealth +5
Damage Resistances piercing
Damage Immunities necrotic, poison
Condition Immunities Exhaustion, Poisoned
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 17
Languages Common, Draconic
Challenge 14 (11,500 XP)

Traits

Legendary Resistance (3/Day). If Karavarix fails a saving throw, it can choose to succeed instead.

Unusual Nature. Karavarix doesn't require air, food, drink, or sleep.

Actions

Multiattack. Karavarix makes one Bite attack and two Claw attacks.

Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit:17 (2d10 + 6) piercing damage plus 4 (1d8) necrotic damage. If the target is a Large or smaller creature, it is grappled (escape DC 19). Until this grapple ends, the target is restrained, and Karavarix can't bite a different target.

Claw. Melee Weapon Attack: +11 to hit, reach 5 ft. one target. Hit:10 (1d8 + 6) slashing damage.

Cataclysmic Breath (Recharge 5–6). Karavarix exhales a wave of ghostly purple flames in a 60-foot cone. Each creature in that area must make a DC 18 Dexterity saving throw, taking 45 (10d8) necrotic damage on a failed save, or half as much damage on a successful one. A creature dies if the breath reduces it to 0 hit points. Additionally, any Medium or smaller Humanoid killed by the breath's damage, as well as every corpse of such a creature within the cone, becomes a zombie (see the Monster Manual) under the dragon's control. The zombie acts on the dragon's initiative but immediately after the dragon's turn. Absent any other command, the zombie tries to kill any non-Undead creature it encounters.

Legendary Actions

Claw. Karavarix makes one Claw attack.

Cataclysmic Rush (Costs 2 Actions). Karavarix moves up to half its flying speed without provoking opportunity attacks, carrying with it any creatures it is grappling. During this move, if it enters the space of a Medium or smaller creature, that creature takes 4 (1d8) necrotic damage. A creature can take this damage only once per turn.