Armanite

Large Fiend (Demon), Chaotic Evil

STR
21 (+5)
DEX
18 (+4)
CON
21 (+5)
INT
8 (-1)
WIS
12 (+1)
CHA
13 (+1)
Magic Resistance.

The armanite has advantage on saving throws against spells and other magical effects.

Actions

Multiattack.

The armanite makes one Claw attack, one Hooves attack, and one Serrated Tail attack.

Claw.

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 10 (2d4 + 5) slashing damage plus 9 (2d8) lightning damage.

Hooves.

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage. If the target is a Large or smaller creature, it must succeed on a DC 16 Strength saving throw or be knocked prone.

Serrated Tail.

Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 16 (2d10 + 5) slashing damage.

Lightning Lance (Recharge 5-6).

The armanite looses a bolt of lightning in a line that is 60 feet long and 10 feet wide. Each creature in the line must make a DC 15 Dexterity saving throw, taking 36 (8d8) lightning damage on a failed save, or half as much damage on a successful one.

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Armanite

Source: Mordenkainen Presents: Monsters of the Multiverse, p. 50 - Licenses and attribution