Demonic Restoration. If the Arachivel dies outside the Abyss, its body dissolves into ichor, and it gains a new body instantly, reviving with all its Hit Points somewhere in the Abyss.
Magic Resistance. The glabrezu has Advantage on saving throws against spells and other magical effects.
Multiattack. Arachivel performs one attack with its sword and one attack with its pincers or three attacks with its pincers and uses its Pummel or Spellcasting.
Pincer. Melee Attack Roll: +9, reach 10 ft. Hit: 8 (1d10 + 5) Slashing damage. If the target is a Medium or smaller creature, it has the Grappled condition (escape DC 15) from one of two pincers.
Giant Sword. Melee Attack Roll: +9, reach 10 ft. Hit: 16 [rollable](2d10 + 5);{"diceNotation":"2d10+5", "rollType":"damage", "rollAction": If your attack roll with this weapon misses a creature, you can deal damage to that creature equal to the ability modifier you used to make the attack roll. This damage is the same type dealt by the weapon (5) and the damage can be increased only by increasing the ability modifier.
Pummel. Dexterity Saving Throw: DC 17, one creature Grappled by the glabrezu. Failure: 15 (3d6 + 5) Bludgeoning damage. Success: Half damage.
Spellcasting. The Arachivel casts one of the following spells, requiring no Material components and using charisma as the spellcasting ability (spell save DC 17):
At Will: Darkness, Detect Magic, Dispel Magic
1/Day Each: Confusion, Fly, Power Word Stun
Description
The Arachivel are sent to the material plane as emissaries of their demon lord. Endowed with enormous charisma, they instigate in their victims the carnal desires of vanity, leading to a process of decay in their souls due to the gifts they have obtained.
Sweet-spoken and extremely beautiful, they easily captivate their victims with promises of lust, increasingly corrupting their souls until they manage to take their souls to the Abyss.
With a gigantic size, a shapely body, dark skin and four enormous arachnid legs on their backs (which according to legends, were a punishment from Asmodeus, who took away their wings, leaving only their skeletons), and always carrying with them a huge sword that symbolizes their strength, they can change their sweet form into a feral combatant.