Gargantuan beast, unaligned

Armor Class 14 (natural armor)
Hit Points 232 (15d20 + 75)
Speed 40 ft., climb 40 ft., swim 40 ft.

26 (+8) 10 (+0) 20 (+5) 3 (-4) 10 (+0) 3 (-4)

Saving Throws Dex +5, Wis +5
Skills Perception +5
Senses blindsight 10 ft., passive Perception 15
Challenge 12 (8,400 XP)

Special Traits

  • Slither. If the titanoboa hasn’t eaten a Huge creature in the last 24 hours, it can move through a space as narrow as 10 feet wide without squeezing, or 5 feet while squeezing.
  • Sparkling Scales. The titanoboa’s scales refract light in iridescent cascades that are hypnotic to gaze upon. If the titanoboa is in bright light, a creature within 30 feet that looks at it must make a successful DC 17 Wisdom saving throw or be stunned until the end of its next turn. Unless surprised, a creature can avoid the saving throw by choosing to avert its eyes at the start of its turn. A creature that averts its eyes can’t see the titanoboa until the start of its next turn, when it can choose to avert its eyes again. If the creature looks at the titanoboa in the meantime, it must immediately make the saving throw.


  • Multiattack. The titanoboa makes one bite attack and one constrict attack.
  • Bite. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 21 (3d8 + 8) piercing damage. If the target is a Huge or smaller creature, it must succeed on a DC 18 Dexterity saving throw or be swallowed by the titanoboa. A swallowed creature is blinded and restrained, has total cover against attacks and other effects outside the snake, and takes 21 (6d6) acid damage at the start of each of the titanoboa’s turns. If the titanoboa takes 30 damage or more on a single turn from a creature inside it, the titanoboa must succeed on a DC 15 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of the titanoboa. If the titanoboa dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 20 feet of movement, exiting prone.
  • Constrict. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 27 (3d12 + 8) bludgeoning damage, and the target is grappled (escape DC 18). Until this grapple ends, the target is restrained, and the titanoboa can’t constrict another target.


A This titanic green serpent can raise its enormous head high above, as much as 20 feet high. Its body extends in seemingly endless coils.


Territorial and Aggressive. Territorial and voracious, the rare titanoboa devours all trespassers in its domain. Stronger and faster than the giant anaconda, the true king of the rainforest is also more stubborn, fighting off entire groups of hunters and poachers. When stalking prey, these great serpents strike from ambush, swallowing even many dinosaurs in one bite.

Blinding Scales. Against groups of foes, titanoboas trust in their ability to dazzle their enemies with the light reflected from their scales, using this distraction to entwine the stunned foes in crushing coils.

Slow to Mate. Titanoboas mate rarely. They live for hundreds of years and never stop growing, which makes the need for propagation less urgent. When two titanoboas nest, the result is a brood of a half-dozen smaller snakes (giant constrictor snakes). An adult titanoboa is at least 80 feet long and weighs 6,000 lb. or more.

Section 15: Copyright Notice

Tome of Beasts. Copyright 2016, Open Design; Authors Chris Harris, Dan Dillon, Rodrigo Garcia Carmona, and Wolfgang Baur.

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