Bainsti

Built around a banshee's unhallowed skull, baintsi are thankfully rare construct due to the rarity of this prime ingredient. Encased in enchanted crystal, the skull sits where the face would be in the foul bust. The profane brass construction has sculpted hair running down the back of the enclosure and pointed ears jutting from the locks. That statue's shoulders are dotted with honeycomb patterns, each with a polished onyx fixed inside. Below the shoulders, the baintsi is nothing more than a brazen urn containing dirt from its disturbed grave. A halo of crimson lightning floats above its head with regular rivulets of electricity cascading down its casing.

Wailing Ward. Dark fey and elven necromancers have methods to divine where the corpse a banshee rose from lays but obtaining the accursed craniums is a different matter entirely. Even then, the crofter has to tightly bind the unholy energies saturating the corpse to both empower the baintsi and focus its undying hatred where the creator wants it. This warding creates a shielding that converts hostile spells into destructive shrieks directed back at the caster.

Profane Font. Likewise, the profane power within the baintsi sheathes it in an aura of voltaic fury. The strange, crimson lighting burns the living as its natural counterpart, but when focused on an undead creature stitches its body back together. Thus, necromancers usually deploy a baintsi among a cadre of lesser undead such as skeletons and zombies to keep the cannon fodder in the fight for just a bit longer.

Baintsi

small construct, lawful evil

Armor Class 15 (natural armor)

Hit Points 44 (8d6 + 16)

Speed 0ft

Flight 40ft (hover)

Str 11 Dex 16 Con 15 Int 10 Wis 11 Cha 16

Condition Immunities Exhaustion, Poisoned

Damage Immunities Lightning, Poison, Thunder

Damage Resistances Bludgeoning, Piercing and Slashing from non-magical weapons that aren't adamantine

Damage Vulnerabilities Radiant

Senses darkvision 60ft, passive Perception 10.

Languages understands sylvan but cannot speak

Challenge 4 (1,100 XP)

Arcane Reverberation:

Whenever the baintsi successfully saves against a spell if the creature that cast that spell is within 120 feet that creature must succeed on a DC 13 Constitution save or take 10 (3d6) thunder damage and is Deafened for the next minute. At the end of each of its turns, an affected creature may repeat the save with the effect ending on success.

Stitching Arc:

Whenever the baintsi is subject to lightning damage, it takes no damage. Instead, it may use its bonus action to choose an undead it can see within 30ft that regains a number of hit points equal to the lightning damage dealt.

Actions

Multiattack:

If a baintsi makes four lighting lash attacks as one action.

Lightning Lash:

Ranged Spell Attack: +5 to hit, range 10ft., one target. Hit: 5 (2d4) lightning damage.

Galvanic Flash (Recharge 6):

The baintsi's burnished shell crackles with electricity and creates an eye-searing burst of light with a radius of 20ft. Creatures in this area of effect must succeed on a DC 13 Constitution save or be blinded for the next minute. At the end of each of its turns, a creature may repeat this save the effect ending on success.

Creatures that fail the save by 5 or more are permanently blinded until the condition is removed by Lesser Restoration or a like spell or effect.

Graveyard Shriek (Recharge 5-6):

The baintsi wails a 20ft cone of soul-jarring sound. Creatures in the area of effect must succeed on a DC 13 Wisdom save or take 20 (6d6) psychic damage and are incapacitated until the end of its next turn. On success, a creature takes half as much damage and is not incapacitated.