Aqua Dragon (5e Creature)
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Small dragon, neutral good
Skills Arcana +4, Insight +4, Perception +4, Persuasion +5, Stealth +9
Amphibious. The dragon can breathe air and water.
Superior Invisibility. As a bonus action, the dragon can magically turn invisible until its concentration ends (as if concentrating on a spell). Any equipment the dragon wears or carries is invisible with it.
Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 1 piercing damage, plus 4 (1d8) fire damage.
Breath Weapon (Recharge 5-6) The dragon uses one of the following breath weapons.
Steam Breath. The dragon exhales a 30-foot cone of scalding steam. Each creature in that area must succeed on a DC 12 Dexterity saving throw, taking 10 (3d6) fire damage on a failed save, or half as much damage on a successful one. Being underwater doesn't grant resistance against this damage.
Change Shape. The dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than its own, or back into its true form. It reverts to its true form if it dies. Any equipment it is wearing or carrying is absorbed or borne by the new form (the dragon's choice).
Aqua dragons are small, curious dragons that live in caves that are close to large bodies of water, though they prefer to live close to the sea. They are able swimmers that can fire a scalding breath, but they can also emit healing energy that soothes and dispels curses, sickness, and poison.
Tiny Hoarders. Like many other dragons, aqua dragons keep hoards, usually buried near bodies of water, sometimes underwater. An aqua dragon might keep a sack of coins buried by the banks of a mighty river, and travellers must be careful when they discover treasures near water, lest they unknowingly steal from one of these minute dragons, who, despite their usually kind natures, take thieves very seriously, hunting them until their treasures have been returned.