Armor Class 14
Hit Points 68 (8d8 + 32)
Speed 30 ft., fly 30 ft.
Damage Immunities lightning, poison
Condition Immunities charmed, exhaustion, frightened, paralyzed, poisoned
Senses passive Perception 10
Languages understands the languages of its creator but can't speak
Challenge 3
Fiery End. If the magen dies, its body disintegrates in a harmless burst of fire and smoke, leaving behind anything it was wearing or carrying.
Magic Resistance. The magen has advantage on saving throws against spells and other magical effects.
Unusual Nature. The magen doesn't require air, food, drink, or sleep.
Multiattack. The magen makes two Shocking Touch attacks.
Shocking Touch. Melee Spell Attack: +6 to hit, reach 5 ft., one target (the magen has advantage on the attack roll if the target is wearing armor made of metal). Hit: 7 (1d6 + 4) lightning damage.
Static Discharge (Recharge 5–6). The magen discharges a lightning bolt in a 60-foot line that is 5 feet wide. Each creature in that line must make a DC 14 Dexterity saving throw (with disadvantage if the creature is wearing armor made of metal), taking 22 (4d10) lightning damage on a failed save, or half as much damage on a successful one.
IDRotF, p. 301