Magic Resistance. The pseudodragon has Advantage on saving throws against spells and other magical effects.
Multiattack. The pseudodragon makes two Bite attacks.
Bite. Melee Attack Roll: +4, reach 5 ft. Hit: 4 (1d4 + 2) Piercing damage.
Sting. Constitution Saving Throw: DC 12, one creature the pseudodragon can see within 5 feet. Failure: 5 (2d4) Poison damage, and the target has the Poisoned condition for 1 hour. While Poisoned, the target also has the Unconscious condition, which ends early if the target takes damage or a creature within 5 feet of it takes an action to wake it.
Resistances. Damage type chosen for the Draconic Origin trait below.
Draconic Origin. The half-dragon is related to a type of dragon associated with one of the following damage types (DM’s choice): Acid, Cold, Fire, Lightning, or Poison. This choice affects other aspects of the stat block.
Multiattack. The half-dragon makes two Claw attacks.
Claw. Melee Attack Roll: +7, reach 10 ft. Hit: 6 (1d4 + 4) Slashing damage plus 7 (2d6) damage of the type chosen for the Draconic Origin trait.
Dragon’s Breath (Recharge 5–6). Dexterity Saving Throw: DC 14, each creature in a 30-foot Cone. Failure: 28 (8d6) damage of the type chosen for the Draconic Origin trait. Success: Half damage.
Bonus Actions:
Leap. The half-dragon jumps up to 30 feet by spending 10 feet of movement.
Magic Resistance. The dragon has Advantage on saving throws against spells and other magical effects.
Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 12):
At Will: Dancing Lights, Mage Hand, Minor Illusion
Bite. Melee Attack Roll: +5, reach 5 ft. Hit: 5 (1d4 + 3) Piercing damage plus 2 (1d4) Psychic damage.
Euphoria Breath (Recharge 5–6). Wisdom Saving Throw: DC 12, each creature in a 15-foot Cone. Failure: The target has the Incapacitated condition until the end of its next turn and uses all its movement on its turn to move in a random direction.
Bonus Actions:
Superior Invisibility. The dragon casts Greater Invisibility on itself, requiring no spell components and using the same spellcasting ability as Spellcasting.
Magic Resistance. The dragon has Advantage on saving throws against spells and other magical effects.
Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 13):
At Will: Dancing Lights, Mage Hand, Minor Illusion
1/Day Each: Hallucinatory Terrain, Polymorph
Bite. Melee Attack Roll: +7, reach 5 ft. Hit: 7 (1d4 + 5) Piercing damage plus 3 (1d6) Psychic damage.
Euphoria Breath (Recharge 5–6). Wisdom Saving Throw: DC 13, each creature in a 15-foot Cone. Failure: The target has the Incapacitated condition and repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically. While Incapacitated, the target uses all its movement on each of its turns to move in a random direction.
Bonus Actions:
Superior Invisibility. The dragon casts Greater Invisibility on itself, requiring no spell components and using the same spellcasting ability as Spellcasting.
Amphibious. The dragon can breathe air and water.
Multiattack. The dragon makes three Bite attacks. It can replace one attack with a Tail attack.
Bite. Melee Attack Roll: +13, reach 15 ft. Hit: 23 (3d10 + 7) Piercing damage plus 7 (2d6) Fire damage. Being underwater doesn’t grant Resistance to this Fire damage.
Tail. Melee Attack Roll: +13, reach 15 ft. Hit: 18 (2d10 + 7) Bludgeoning damage. If the target is a Huge or smaller creature, it has the Prone condition.
Steam Breath (Recharge 5–6). Constitution Saving Throw: DC 19, each creature in a 60-foot Cone. Failure: 56 (16d6) Fire damage. Success: Half damage. Failure or Success: Being underwater doesn’t grant Resistance to this Fire damage.