Shapechanger. The slaad can use its action to polymorph into a Small or Medium humanoid, or back into its true form. Its statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form if it dies.
Innate Spellcasting. The slaad’s innate spellcasting ability is Charisma (spell save DC 22, +14 to hit with spell attacks). The slaad can innately cast the following spells, requiring no material components:
At will: animate objects, circle of death, greater invisibility (self only), dispel evil and good, dispel magic, fear, plane shift, protection from evil and good, darkness (5th level)
3/day each: fireball, fly, lightning bolt, magic circle, shatter, teleport
1/day each: maddening darkness, power word kill, finger of death, ravenous void, dark star
Magic Resistance. The slaad has advantage on saving throws against spells and other magical effects.
Magic Weapons. The slaad’s weapon attacks are magical.
Regeneration. The slaad regains 20 hit points at the start of its turn if it has at least 1 hit point.
Living Entropy. Do to their bodies being simply voids, areas of insubstantial darkness in the shape of frog like humanoids, the black slaad is immune to disease.
Living Shadow. While in dim light or darkness, the slaad has resistance to damage that isn’t force, psychic, or radiant.
Shadow Stealth. While in dim light or darkness, the slaad can take the Hide action as a bonus action.
Entropic Void. When the Black Slaad dies, it's body forms into a swirling void of entropic energy that each creature within 30 feet of it must make a DC 22 Strength saving throw, or be pulled 30 feet towards the center of the void, the void has 1 hp and is immune to all damage but vulnerable to radiant damage, this void otherwise functions like the dark star spell but lasts the full duration unless it is destroyed.
Multiattack. The slaad makes three attacks: one with its tongue and two with its claws or greatsword.
Tongue (Slaad Form Only). Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 31 (10d4 + 6) piercing damage plus 7 (2d6) necrotic damage.
Claws (Slaad Form Only). Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 25 (3d10 + 9) slashing damage plus 7 (2d6) necrotic damage.
Greatsword. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 16 (2d6 + 9) slashing damage plus 7 (2d6) necrotic damage.
Chaos Spittle. Ranged Spell Attack: +11 to hit, reach 60 ft., one creature that the slaad can see. Hit: 25 (10d4) necrotic damage. Unless the effect of this chaos energy is somehow neutralized such as by a greater restoration spell or similar effect, a creature hit by this attack takes an additional 12 (5d4) necrotic damage at the end of each of it's turns, this effect ends automatically after 9 turns.
The Black Slaad 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 Black Slaad regains spent legendary actions at the start of its turn.
Teleport. The Black Slaad magically teleports, along with any equipment it is wearing or carrying, up to 15 feet to an unoccupied space it can see.
Spell (Costs 2 Actions). The black slaad casts one of it's spells.
Entropic Surge (Costs 3 Actions). Each creature within 20 feet of The Black Slaad must make a DC 20 Constitution saving throw against this magic, taking 42 (12d6) necrotic damage on a failed save, or half as much damage on a successful one.
Description
Living Voids. Black slaadi, also known as void slaads, were inherently different to other slaadi; rather than being batrachian monsters with actual bodies, black slaads were simply voids, areas of insubstantial darkness in the shape of humanoid toads. Their prehensile tongues were 15 ft (4.6 m) long and their eyes were akin to gleaming stars that shimmered with malice. The energy that composed the void slaadi was similar to that wielded by the Lord of Entropy, Ygorl. Sometimes Ygorl personally selected certain void slaadi to undergo a special transformation, with his touch turning them into special black slaadi known as entropics. Entropics were his closest followers, but far more fragile than normal black slaadi and far more direct, simply charging directly into combat and only attacking from range when unable to reach their enemies.
Tainted Chaos. Though typically chaotic neutral like most slaadi, black slaadi had a tendency towards evil behavior, possibly as a result of their origins. Like green and death slaadi, white slaadi that survived for over a century were known to enter a period of self-isolation, reappearing after over a year as black slaadi. However, the process was potentially different from that undertaken by their lesser counterparts. When ordinary slaadi underwent the process of exile, there was a high chance that they would fail and be reabsorbed into the primal chaos of Limbo. Black slaadi, on the other hand, were formed when slaadi had their physical forms engulfed by the entropic energies of the Abyss, transforming them into living embodiments of the destructive force.
Deadly Death. What made them dangerous was that upon death they would transform into entropic voids, drifting, barely sentient black holes that pulled enemies towards them until destroyed. A destroyed void was still problematic, since in their wake they left only a pocket of nothingness from which, if the slaadi had fought alongside Ygorl, a new entropic would likely appear.
Legendary Chaos. Black slaadi eclipsed even some ancient dragons in terms of strength, possessing many of the same powers of white slaadi. Like them, black slaadi could harness raw chaos, an incredibly dangerous substance that caustically dissolved most things like acid, which they could spit at their foes in globs or deliver with a touch of their dexterous tongues. Their power over degradation was even more fearsome than that of the white slaadi; they could blast foes with rays of entropy, create black, harmful voids, and even a swipe of their raking claws made it more difficult for their victims to recover. Black slaadi shared several of the spell-like abilities of the white slaadi as well as their ability to summon others of their kind, with the added benefit of more powerful magic and the option to summon white slaadi themselves.
Relentless Ambushers. In combat Black slaadi took advantage of their superior vision to outmatch their enemies, using their truesight ability to see past trickery involving spells like invisibility and blur while creating darkness to fight within since most creatures couldn't see within it. They teleported across the battlefield, rending their opponents and blasting them with entropic power.
Clerics of Chaos. From what little is known of slaad society, Black slaadi were known to become clerics, supposedly serving and perhaps even worshiping the slaad lords.
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Posted Dec 21, 2021This is just what I've been looking for my level 20 oneshot where the players are fighting in Limbo! A question though: Did you form this out of an old statblock or just addded what you thought was necessary? Those 1/day spells seem to be really strong and over the top, but on the other hand the CR of the encounter IS 23...
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Posted Dec 21, 2021it is basically a 5e adaptation of what was in older editions to fit the model of how stat blocks and features for monsters are handled in 5e for most monsters