War Behir

War Carriage. The behir carries a custom-made carriage that allows four Medium creatures or one Large creature to be transported on its the back. This carriage is attached to the creature by four leather straps and harnesses which, if severed, cause it to tumble off the creature’s back. Each of the straps of this war carriage are Tiny objects with AC 18 and 10 hp and immunity to poison and psychic damage.

Mounted Weaponry. The behir's carriage has four mounted harpoon crossbows attached to the railings of its war carriage. Any humanoid creature within the carriage can make an attack with this weapon as an action (see the behir's Actions).

Multiattack. The behir makes two attacks: one with its bite and one to constrict.

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 22 (3d10 + 6) piercing damage.

Constrict. Melee Weapon Attack: +10 to hit, reach 5 ft., one Large or smaller creature. Hit: 17 (2d10 + 6) bludgeoning damage plus 17 (2d10 + 6) slashing damage. The target is grappled (escape DC 16) if the behir isn't already constricting a creature, and the target is restrained until this grapple ends.

Lightning Breath (Recharge 5–6). The behir exhales a line of lightning that is 20 feet long and 5 feet wide. Each creature in that line must make a DC 16 Dexterity saving throw, taking 66 (12d10) lightning damage on a failed save, or half as much damage on a successful one.

Swallow. The behir makes one bite attack against a Medium or smaller target it is grappling. If the attack hits, the target is also swallowed, and the grapple ends. While swallowed, the target is blinded and restrained, it has total cover against attacks and other effects outside the behir, and it takes 21 (6d6) acid damage at the start of each of the behir's turns. A behir can have only one creature swallowed at a time.

If the behir takes 30 damage or more on a single turn from the swallowed creature, the behir must succeed on a DC 14 Constitution saving throw at the end of that turn or regurgitate the creature, which falls prone in a space within 10 feet of the behir. If the behir dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 15 feet of movement, exiting prone.

Mounted Harpoon Crossbow (Rider Only). RangedWeapon Attack: +5 to hit, range 60 ft., one target. Hit: 5 (1d10) piercing damage and the target must succeed on a DC 13 Strength saving throw or be harpooned. A harpooned creature takes 3 (1d6) piercing damage at the start of each of its turns and can’t move more than 60 feet from the war monster. If a creature on the war platform succeeds on a Strength contest against the target as an action, it can move the target up to 30 feet closer to the platform. The creature can repeat this saving throw as an action, ending the effect on a success.