Arczaurian Commander

Air Supply. If it has at least 1 hit point, the arczaurian’s armor can generate breathable air when in a vacuum or underwater. This air can sustain the arczaurian indefinitely.

Firearms Knowledge. The arczaurian’s mastery of its weapons enables it to ignore the loading property of any firearm.

Keen Sight and Smell. The arczaurian has advantage on Wisdom (Perception) checks that rely on sight or smell.

Legendary Resistance (3/Day). If the arczaurian fails a saving throw, it can choose to succeed instead.

Magic Resistance. The arczaurian’s armor gives it advantage on saving throws against spells and other magical effects.

Survivor. The arczaurian regains 10 hit points at the start of its turn if it has fewer than half its hit points but at least 1 hit point.

Spellcasting (Special Equipment). The arczaurian can cast the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 18, +10 to hit with spell attacks):

At will: light, message, shocking grasp

3/day each: fly (self only), invisibility (self only), lightning bolt, nondetection (self only)

1/day each: chain lightning, dimension door, plane shift, sunbeam

Multiattack. The arczaurian makes two attacks, using Electro-Glaive, Lightning Gun, or both.

Claws. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Electro-Glaive. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 14 (2d10 + 4) slashing damage plus 5 (1d10) lightning damage, and on a critical hit, the target must succeed on a DC 13 Constitution saving throw or be stunned until the end of their next turn.

Lightning Gun. Ranged Weapon Attack: +10 to hit, range 150/600 ft., one target. Hit: 23 (3d10 + 5) lightning damage.

Force Grenade. The arczaurian throws a grenade up to 60 feet, and the grenade explodes in a 20-foot-radius sphere. Each creature in that area must make a DC 15 Dexterity saving throw, taking 17 (5d6) force damage on a failed save, or half as much damage on a successful one. After the arczaurian throws the grenade, roll a d6; on a roll of 4 or lower, the arczaurian has no more grenades to throw.

Frightening Roar. The arczaurian targets one creature it can see within 30 feet of it. If the target can see or hear it, the target must succeed on a DC 17 Wisdom saving throw or be frightened of the arczaurian until the end of arczaurian’s next turn.

Parry. The arczaurian adds 5 to its AC against one melee attack that would hit it. To do so, the arczaurian must see the attacker and be wielding a melee weapon.

The arczaurian 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. The arczaurian regains spent legendary actions at the start of its turn.

Command Ally. The arczaurian targets one ally it can see within 30 feet of it. If the target can see or hear the arczaurian, the target can make one melee weapon attack using its reaction, if available, and has advantage on the attack roll.

Attack. The arczaurian makes one Electro-Glaive attack.

Roar (2 Actions). The arczaurian uses it’s Frightening Roar.