Legendary Resistance (3/Day). If the Colossal Constrictor Snake fails a saving throw, it can choose to succeed instead.
Multiattack. The Colossal Constrictor Snake makes two attacks: one with is Bite and one with its Constrict. It can't make make both attacks against the same Target
Bite. Melee Weapon Attack: +12 to hit, reach 15 ft., one creature. Hit: 35 (8d6 + 7) piercing damage, and the target is grappled (escape DC 16). Until this Grapple ends, the target is restrained, and the Colossal Constrictor Snake can't bite another Target.
Constrict. Melee Weapon Attack: +12 to hit, reach 5 ft., one creature. Hit: 25 (4d8 + 7) bludgeoning damage, and the target is grappled (escape DC 16). Until this grapple ends, the creature is restrained, and the snake can't constrict another target. If a creature is grappled at the start of the Colossal Constrictor Snake turn, Constrict hits without needing to roll for an attack.
Swallow. The Colossal Constrictor Snake makes one Bite Attack against a Large or smaller target it is Grappling. If the Attack hits the target is swallowed and the grapple ends. the swallowed target is blinded and restrained, it has total cover against attacks and other effects outside the Colossal Constrictor Snake, and it takes 25 (5d6 + 7) acid damage at the start of each of the Colossal Constrictor Snake's turns. The Colossal Constrictor Snake can have only one target swallowed at a time.
If the Colossal Constrictor Snake dies or takes 75 damage in one round, a swallowed creature is regurgitated and becomes prone, and stunnedfor the rest of the round.
Colossal Constrictor Snake can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Colossal Constrictor Snake regains spent legendary actions at the start of their turn.
Detect. The dragon makes a Wisdom (Perception) check.
Bite Attack (Costs 2 Actions). The Colossal Constrictor Snake makes a tail attack.
Swallow Attack (Costs 3 Actions). The Colossal Constrictor Snake makes a tail attack.
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