Sources
CR
Type
Size
Alignment
Movement

Young Green Dragon

Large Dragon, Lawful Evil

Armor Class 18 (natural armor)
Hit Points 136 (16d10 + 48)
Speed 40 ft., fly 80 ft., swim 40 ft.
STR
19
+4
DEX
12
+1
CON
17
+3
INT
16
+3
WIS
13
+1
CHA
15
+2
Saving Throws DEX +4, CON +6, WIS +4, CHA +5
Skills Deception +5, Perception +7, Stealth +4
Damage Immunities poison
Condition Immunities Poisoned
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 17
Languages Common, Draconic
Challenge 8 (3,900 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 7 (2d6) poison damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit:11 (2d6 + 4) slashing damage.

Poison Breath (Recharge 5–6). The dragon exhales poisonous gas in a 30-foot cone. Each creature in that area must make a DC 14 Constitution saving throw, taking 42 (12d6) poison 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.