Crystalline Skin
When the Crystal Aberrant takes 10 or more damage from a single attack or spell, its crystalline structure hardens:
- It gains +2 AC & +2 damage per stack (up to a maximum of +6 AC and +6 damage).
- It loses 10 feet of movement per stack (minimum 0 feet).
- When it reaches 5 stacks, it becomes stunned until it succeeds on a DC 14 Strength saving throw at the start of its turn.
Parasitic Crystal
If the Crystal Aberrant kills a humanoid in melee combat, the corpse becomes crystallized.
- At the start of the Crystal Aberrant’s next turn, the corpse rises as a new Crystal Aberrant!
Multiattack
The Crystal Aberrant makes two melee attacks or one melee and one ranged attack.
Slam (Melee Weapon Attack)
Attack: +7 to hit, reach 5 ft., one target.
Hit: (2d8 + 5) bludgeoning damage.
Crystal Spear (Ranged Weapon Attack)
Attack: +7 to hit, range 30/120 ft., one target.
Hit: (2d6 + 5) piercing damage.
- If the Crystal Aberrant has Crystalline Skin stacks, it can remove all AC bonuses to add +1 extra damage die to this attack.
Crystal Nova (1/Day)
The Crystal Aberrant shatters all its AC and damage bonuses to unleash an explosion of razor-sharp crystals.
- Creatures within 20 feet must make a DC 14 Dexterity saving throw or take 6d6 piercing damage.
- After using this ability, all Crystalline Skin stacks reset to 0.
The Crystal Aberrant has no bonus actions.
Shatter Strike
When the Crystal Aberrant is hit by a melee attack, it can break off a part of its body to retaliate.
- The attacker takes 1d8 piercing damage.
- If the Crystal Aberrant has Crystalline Skin stacks, it loses 1 stack when using this ability.
Enter the description for how legendary actions work for your monster here.
Legendary Action Name (Costs # Actions). Enter the description for your legendary action.
Mythic Action Name. Enter the description for how mythic actions work for your monster here.
Mythic Action Name (Costs # Actions). Enter the description for your mythic action.
Description
Crystal Aberrant – Description
A terrifying fusion of flesh and crystal, the Crystal Aberrant is a grotesque remnant of those who succumbed to the parasitic crystal infection. Its once-living body is now a jagged, reflective husk, covered in razor-sharp crystalline growths that shift and harden in response to attacks.
These creatures prowl deep caverns, crystal-filled ruins, and the darkest corners of the Underdark, waiting for new hosts to assimilate. As they take damage, their crystalline bodies reinforce themselves, becoming harder to strike while their blows grow more lethal.
What makes the Crystal Aberrant truly horrifying is its parasitic reproduction—any humanoid it kills is soon reborn as another of its kind, adding to the relentless march of crystalline corruption.
Legends tell of entire settlements vanishing overnight, consumed by an unknown force, only for explorers to later find the ruins overgrown with eerie, pulsing crystal formations. Few who venture too close ever return untainted.
Lair and Lair Actions
Enter a description of your monster's lair here.
Lair Actions
On initiative count # (losing initiative ties), the [monster name] takes a lair action to cause one of the following effects; the [monster name] can’t use the same effect two rounds in a row:
- Enter a description for a lair action.
- Enter a description for a lair action.
Regional Effects
The region containing a legendary [monster name]’s lair is [enter the effect description], which creates one or more of the following effects:
- Enter a regional effect description.
- Enter a regional effect description.
If the [monster name] dies, these effects fade over the course of #d# days.
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