Sources
CR
Type
Size
Alignment
Movement

Young Black Dragon

Large Dragon, Chaotic Evil

Armor Class 18 (natural armor)
Hit Points 127 (15d10 + 45)
Speed 40 ft., fly 80 ft., swim 40 ft.
STR
19
+4
DEX
14
+2
CON
17
+3
INT
12
+1
WIS
11
+0
CHA
15
+2
Saving Throws DEX +5, CON +6, WIS +3, CHA +5
Skills Perception +6, Stealth +5
Damage Immunities acid
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 16
Languages Common, Draconic
Challenge 7 (2,900 XP)

Traits

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.

Lore

True dragons are winged reptiles of ancient lineage and fearsome power. They are known and feared for their predatory cunning and greed, with the oldest dragons accounted as some of the most powerful creatures in the world. Dragons are also magical creatures whose innate power fuels their dreaded breath weapons and other preternatural abilities.