Huge Swarm of Large constructs, Chaotic Neutral
Armor Class 15 Natural Armor
Hit Points 60 (10d12 + 8)
Speed 25 ft., Walk 15 ft.
STR
16 (+3)
DEX
10 (+0)
CON
16 (+3)
INT
6 (-2)
WIS
10 (+0)
CHA
6 (-2)
Saving Throws STR +7, CON +7
Skills Stealth +3
Damage Resistances Radiant
Senses Passive Perception 13
Languages None
Challenge 12 (8,400 XP)
Proficiency Bonus +4
Traits

Crystal Clear. All enemies roll at disadvantage while using sight to perceive where the creature is. Enemies also attack at disadvantage when using ranged attacks or spells. The creature is resistant to radiant damage. 

Spellcasting. The Crystalenyx is a 1-level spellcaster. Its spellcasting ability is 14 (spell save DC 13).  
1st level (2 slots): Hypnotic Crystals: Creature must succeed on a Wisdom 13 saving throw or become stunned. 

Actions

Crystalize. Until the creature's next turn, it gains resistance to Bludgeoning, Piercing, and Slashing Damage. 

Crystal Cleaver. Melee Weapon Attack: +3 to hit, reach 5 ft., 1 target, (4d8+ 1) Slashing damage. 

Rock-Hard Fists. Melee Weapon Attack: +3 to hit, reach 5 ft., 1 target, (2d6 +1) Bludgeoning damage. If the first fist hits the creature gets to make a second rock-hard fist attack. 

Diamond Knives. RangedWeapon Attack: +2, range 30/60 ft., 1 target. (6d4 + 2) piercing damage.

Bonus Actions

None

Reactions

Reflect. The Crystalenyx can attempt to reflect a ranged spell attack by rolling a wisdom saving throw higher than the ranged spell attack that was rolled to hit. The reflected spell has a 50% chance to hit the original caster. Roll a d4 and evens hits odds misses.

Legendary Actions

None

Mythic Actions

 

None

Description

The Crystalenyx is a huge crystal golem that lives in caves. It is magically almost 100% clear and light passes almost perfectly through them. It is a very powerful creature that is usually guarding large deposits of gems. Smart kings in the past used them to guard secret tunnels or tombs hidden under their castles. Shards of these creatures have also been used to make spearheads that never need sharpening. 

Lair and Lair Actions

The Crystalenyx's lair is a domed cave that is a giant geode. It sits in front of an ancient tomb of an ancient wizard. Stalagmites and Stalactites are all over and some even create giant bridges and columns within the cave. 

Lair Actions

On initiative count 1 (losing initiative ties), the Crystalenyx takes a lair action to cause one of the following effects; the Crystalenyx can’t use the same effect two rounds in a row:

  • The Crystalenyx can absorb (2d6) worth of hitpoints from the surrounding crystals. 
  • The Crystalenyx crawls up onto the ceiling and can use its Diamond Knife attack but with advantage. 

Regional Effects

The region containing a legendary Crystalenyx’s lair is full of sharp crystals, which creates one or more of the following effects:

  • Each AOE or Missed Bludgeoning attack has a 25% chance to shatter crystals. Roll a d4 and if a 1 is rolled each creature other than the Crystalenyx within 30ft of the attack must make a strength 12 saving throw or take (2d6) damage. 

Habitat: Underdark

MikeyMooMoo

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