Decaton Modron

Decaton Modron
CR 8Large Construct, Lawful Neutral
Reveal Stat Block
Armor Class
16 (natural armor)Hit Points
144 (17d10 + 51)Speed
30 ft., fly 30 ft. (hover)str
18
+4
dex
12
+1
con
16
+3
int
15
+2
wis
15
+2
cha
11
+0
Traits
Axiomatic Mind.The decaton can't be compelled to act in a manner contrary to its nature or its instructions.
Combat Ready.The decaton has advantage on initiative rolls.
Disintegration.If the decaton dies, its body disintegrates into dust, leaving behind anything it was carrying.
Actions
Multiattack.The decaton makes three Tentacle attacks.
Tentacle.mw 7 to hit, reach 10 ft., one target. ({@damage 2d10 + 4) piercing damage, and if the target is a Medium or smaller creature, it has the grappled condition (escape 14). Until this grapple ends, the decaton can't use this tentacle against other targets. The decaton has ten tentacles, each of which can grapple one target.
Lightning Rays.The decaton unleashes a barrage of lightning bolts from its eyes. Each creature within 30 feet of the decaton must make a 13 Dexterity saving throw, taking 38 (7d10) lightning damage on a failed save, or half as much damage on a successful save.