18 (natural armor)
133 (14d12 + 42)
40 ft., fly 90 ft., swim 30 ft.
Acrobatics +9, Perception +7, Stealth +9
thunder, lightning, radiant
darkvision 120 ft.
Draconic, Sylvan
10
The rainbow serpent doesn't provoke an opportunity attack when it flies out of an enemy's reach.
The rainbow serpent creates a rainbow when it awakens.
The rainbow serpent makes one bite attack and one claws attack.
Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 15 (2d8 + 6) piercing damage.
Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 10 (1d8 + 6) slashing damage.
The rainbow serpent sends out blinding rainbows in a 60-foot cone. Each creature in that area must make a DC 17 Constitution saving throw or take 27 (6d8) radiant damage and suffer the blinded condition until the end of its next turn, half damage on a successful save.