Large Ooze, Unaligned
Armor Class 15 Natural
Hit Points 250 (30d10 + 100)
Speed 20 ft., Swim 40 ft., Walk 25 ft., Climb 15 ft.
STR
19 (+4)
DEX
15 (+2)
CON
16 (+3)
INT
5 (-3)
WIS
5 (-3)
CHA
15 (+2)
Saving Throws STR +9, DEX +7, CON +8
Skills Perception +18
Damage Vulnerabilities Bludgeoning, Fire, Psychic, Radiant, Thunder
Damage Resistances Acid, Cold, Force, Lightning, Poison, Ranged Attacks
Damage Immunities Piercing, Slashing
Condition Immunities Blinded, Deafened, Grappled, Prone, Restrained, Stunned
Senses Blindsight 40', Passive Perception 19
Languages --
Challenge 15 (13,000 XP)
Proficiency Bonus +5
Traits

Mineral Shaping. The Crystal Ooze will take mineral it has ingested and turn them into edged and bashing weapons for the ends of it tentacles. Minerals it stores in its body are in their natural crystalline shape. It will pull minerals from rock and metals. It will ignore items made of biological like wood, fur, skin and feathers.

Damage transfer. Whenever the Crystal Ooze is damaged it transfers half the damage to anything it has grappled.

Edged Immunity. When attacked with a slashing or piercing weapon the creature will take no damage unless that weapon has another damage component such as fire, poison, etc.

Blindsight.  The Crystal Ooze can perceive its surroundings without sight up to 40'.

Actions

Grapple. The Crystalline Ooze will attempt to grapple one opponent. On a successful grapple it will make a Stunning Tentacle Bash. The Crystal Ooze will retain the grapple and move to grapple another opponent and bash (up to 8 tentacles).

Stunning Tentacle Bash. Melee Weapon Attack: +8 to hit, reach 10 ft., 1 target. Hit: 17 (3d6 +8) Bludgeoning damage. On a hit the opponent must make a successful DC 15 vs constitution or be stunned.  The opponent may attempt to become unstunned at the end of its turn each round.

Only after all opponents within a 30' range are grappled and stunned the Crystal Ooze will then attack each one with a Tentacle Slash per round.

Tentacle Slash. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target. Hit: 10 (1d4 +8) Slashing damage. 

Bonus Actions

Melding As a bonus action the crystal ooze can meld into water or coat a 10' radius surface. This will increase its stealth by 15 in wet environments and by 5 in dry environments. Its AC will also increase by 5.

Polymorph As a bonus action the Crystal Ooze can polymorph into any shape from Medium to Huge size. If the object is metal, stone or crystalline in nature it can mimic it perfectly requiring a Perception DC 20 to tell it apart from similar objects. It the shape is natural (like an animal, humanoid, or plant) a Perception DC 10 will see the imperfections in the disguise.

Reactions

Mineral Absorption. When attacked with a non-magical metal (or other mineral) weapon the Crystal Ooze will absorb the inorganic material from the weapon.  For spears, arrows and bolts, the tips will be absorbed and the shafts ejected.  For melee weapons the weapon will become -1 per attack.

Legendary Actions

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 Actions

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

This Ooze, in its native form, will appear like an amorphous blob of glittery liquid.  It can form up to 8 tentacles at a time that it uses to absorb minerals from any surface it can touch.  It prefers moist, underground environments but can survive in any environment.

Within the body can be seen 2d10 gem stones worth 1d100gp each.  The percentage of precious minerals is 0-10% Diamond, 11-25% Emerald, 26-35% Sapphire, 36-50%, 51-65% Aquamarine, 66-70% Citrine, 71-80% Jade, 81-90% Ruby, 91-100% Rose Quartz.

Also some metals 2d12 chunks will be found in the body in their crystalline forms worth 1d100gp each. 1-10% Platinum, 11-20% Bauxite, 21-45% Pyrite, 46-55% Gold, 56-65% Copper, 66-75% Mithril, 76-85% Adamantine, 86-100% Silver.

When the Crystal Ooze kills a creature it will absorb the minerals from its body leaving a skin sack of offal. These will attract other animals in the area.

The Crystal Ooze reproduces gestating a portion of itself within one of the skin sacks.  If the sack is opened or consumed before the three month gestation period the spawn will die.

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.

Habitat: DesertMountainSwampUnderdark

Marrilius

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