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Crystalline Monstrosities

Crystalline Monstrosities
Crystalline Monstrosity
CR 5
Medium Monstrosity, Chaotic Evil
Reveal Stat Block
Armor Class
16
Hit Points
85
Speed
30 ft.
str
16
+3
dex
12
+1
con
16
+3
int
3
-4
wis
10
+0
cha
6
-2
Crystal Blight.A creature that takes damage from the monstrosity's shard spray or bite must succeed on a DC 14 Constitution saving throw or be infected with the Crystal Blight.
Brittle Body.If the monstrosity takes bludgeoning or sonic damage, it must succeed on a DC 15 Constitution saving throw or have its AC reduced by 2 until it finishes a long rest.

Actions

Multiattack.The monstrosity makes two attacks: one with its bite and one with its claws.
Bite.Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (2d8 + 3) piercing damage plus 7 (2d6) force damage.
Claws.Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.
Shard Spray (Recharge 5-6).The monstrosity launches a spray of jagged crystals in a 20-foot cone. Each creature in that area must make a DC 14 Dexterity saving throw, taking 21 (6d6) piercing damage on a failed save, or half as much damage on a successful one.

Crystalline Monstrosities

Crystalline Monstrosities are the byproduct of "Mana-Enrichment" experiments gone wrong. Originally intended as automated guardians for the High Spire, these entities were exposed to raw, unrefined Aether that caused their structures to mutate and grow uncontrollably. They appear as massive, jagged amalgams of quartz and obsidian, with multiple limbs and glowing "eyes" that project beams of focused magical light.

They are inherently unstable, their very presence causing the air to hum with dangerous resonance.

Secret Motivation: The monstrosities are searching for "Harmony." They are attracted to sources of pure, stable magic and will attempt to "fuse" with them, which invariably results in a catastrophic explosion.

Adventure Hook: A prototype Crystalline Colossus has escaped a research lab and is heading toward a residential district in Kigum. It's not attacking people directly, but its resonance is shattering windows and destabilizing the local wards. The party must find a way to "de-harmonize" the creature before it reaches the district's central Aether-battery.