Young Black Dragon
Large Dragon, chaotic evil
2,900 XP
Special Abilities
Amphibious
The dragon can breathe air and water.
Actions
Multiattack
The dragon makes three attacks: one with its bite and two with its claws.
Bite
Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 4 (1d8) acid damage.
Claw
Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.
Acid Breath (Recharge 5-6)
The dragon exhales acid in a 30-foot line that is 5 feet wide. Each creature in that line must make a DC 14 Dexterity saving throw, taking 49 (11d8) acid damage on a failed save, or half as much damage on a successful one.
Quick Reference
Running This Encounter
A young black dragon is cunning and territorial, preferring to ambush prey rather than engage in direct combat. Position the dragon in its lair where it can use cover and elevated positions to its advantage. Use its acid breath weapon to control the battlefield and separate party members. Remember it can take the Legendary Actions on initiative count 20 to extend combat dynamically.
Combat Tactics
The dragon opens with its acid breath to maximize damage across grouped enemies, then uses hit-and-run tactics by flying out of melee range. It prioritizes spellcasters and ranged attackers, closing in with Multiattack when it can catch isolated targets. If bloodied, it may flee to higher ground or use its lair actions to regain control.
Environment & Setting
Young black dragons dwell in swamps, marshes, and fetid ruins where muddy terrain provides concealment. Incorporate water hazards, difficult terrain, and crumbling stone structures that the dragon can navigate with ease while hampering player movement.