Today I would like to share with you a fun mash up of two monsters: dragon and vampire. We are so use to vampires being humanoid that we forget that a vampire can be of any shape. So when creating it in another form, why not marry it a creature that is already scary like a dragon. Done like this, it opens up some new design space. You can make adjustments to the standard vampire abilities that fit a dragonic form much better. For example, we changed the ability Legendary Resistance to Legendary Scales. This is both familiar while still being unique for this specific monster.
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Vampiric Young Blue Dragon
Large undead, neutral evil
Armor Class 20 (natural armor)
Hit Points 123 (13d10 + 52)
Speed 40 ft., burrow 20 ft., fly 80 ft.
STR 21 (+5) DEX 16 (+3) CON 19 (+4)
INT 22 (+6) WIS 18 (+4) CHA 20 (+5)
Saving Throws Str +10, Con +9, Wis +9, Cha +10
Skills Athletics +10, Perception +9, Stealth +8
Damage Resistances lightning, necrotic; bludgeoning, piercing, and slashing from nonmagical weapons
Senses darkvision 120 ft., passive Perception 19
Languages Common, Draconic
Challenge 14 (11,500 XP)
Legendary Scales (3/Day). If the dragon succeeds a saving throw that would normally deal half damage on a successful save, the dragon can choose to take no damage from the attack. Any conditions that would be applied on a successful save are still applied.
Regeneration. The dragon regains 20 hit points at the start of its turn if it has at least 1 hit point and isn’t in sunlight or running water. If the vampire takes radiant damage or damage from holy water, this trait doesn’t function at the start of the vampire’s next turn.
Vampire Weaknesses. The dragon has the following flaws:
Forbiddance. The vampire can’t enter a residence without an invitation from one of the occupants.
Harmed by Running Water. The dragon takes 20 acid damage if it ends its turn in running water.
Stake to the Heart. If a piercing weapon made of wood is driven into the dragon’s heart while the dragon is incapacitated in its resting place, the dragon is paralyzed until the stake is removed.
Sunlight Hypersensitivity. The dragon takes 20 radiant damage when it starts its turn in sunlight. While in sunlight, it has disadvantage on attack roll and ability checks. .
Multiattack. The dragon makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 24 (3d12 + 5) piercing damage plus 5 (1d10) lightning damage and 5 (1d10) necrotic damage. The target is grappled (escape DC 18). The dragon cannot bite another target while grappling. The target’s hit points maximum is reduced by an amount equal to the necrotic damage taken, and the dragon regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0. A dragon slain in this way and then buried in the ground or a mound of copper, gold, and silver rises the following night as a vampiric dragon spawn under the dragon’s control. If a humanoid is slain in this way and then buried in the ground rises the following night as a vampire spawn under the dragon’s control.
Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 15 (3d8 + 5) slashing damage.
Terrify. The dragon targets one dragon or humanoid it can see within 30 feet of it. If the target can see the dragon, the target must succeed on a DC 18 Wisdom saving throw against this magic or be terrified of the dragon. The terrified target regards the dragon as a imposing image that must be obeyed. Although the target isn’t under the dragon’s control, it takes the dragon’s requests orders that must be carried out or suffer the consequences. Additionally, it is a willing target for the dragon’s bite attack.
Each time the dragon or the dragon’s companions do anything harmful to the target, it can repeat the saving throw, ending the effect on itself on a success. Otherwise, the effect lasts 24 hours or until the dragon is destroyed, is on a different plane of existance than the target, or takes a bonus action to end the effect.
Black Lightning Breath (Recharge 5–6). The dragon exhales lightning infused with necrotic energy in a 60-foot line that is 5 feet wide. Each creature in that line must make a DC 18 Dexterity saving throw, taking 44 (8d10) lightning damage and 44 (8d10) necrotic damage on a failed save, or half as much damage on a successful one.