Large Ooze (Metallic), Neutral Evil
Armor Class 17 Natural Armor
Hit Points 200 (15d10 + 40)
Speed 40 ft., Climb 25 ft.
STR
20 (+5)
DEX
6 (-2)
CON
20 (+5)
INT
8 (-1)
WIS
6 (-2)
CHA
17 (+3)
Saving Throws STR +8, CHA +6
Senses Darkvision 120ft., Passive Perception 11
Languages Common, Halfling, Quori
Challenge 6 (2,300 XP)
Proficiency Bonus +3
Traits
Spellcasting. The Amalgamation of Want is a 6th-level spellcaster. Its spellcasting ability is Charisma(spell save DC 16, +8 to hit with spell attacks). The AoW has following Warlock spells prepared:

Cantrips (at will): Eldritch Blast 
3rd level (4 slots): Mind Spike, Counterspell, Vampiric Touch, Wrathful Smite, Fear

Actions

Multi-attack. AoW makes 3 attacks with its Pseudopods or Eldritch Blasts during its turn.

Pseudopod Slash: +6 to hit, reach 10ft., 1 target. Hit: 2d10 Slashing or Bludgeoning +           1d6 Acid damage. AoW makes a slash with its sword arm shifting between weapons        it has absorbed.

Eldritch Blast: +6 to hit, range 120ft., 1 target. Hit:  1d12 Force +6 damage. Aow fires              bolts of force from its body towards 1 target.

Engulf. The cube moves up to its speed. While doing so, it can enter Large or smaller creatures' spaces. Whenever the cube enters a creature's space, the creature must make a DC 12 Dexterity saving throw. On a successful save, the creature can choose to be pushed 5 feet back or to the side of the cube. A creature that chooses not to be pushed suffers the consequences of a failed saving throw. On a failed save, the cube enters the creature's space, and the creature takes 10 (3d6) acid damage and is engulfed. The engulfed creature can't breathe, is restrained, and takes 21 (6d6) acid damage at the start of each of the cube's turns. When the cube moves, the engulfed creature moves with it. An engulfed creature can try to escape by taking an action to make a DC 12 Strength check. On a success, the creature escapes and enters a space of its choice within 5 feet of the cube.

Bonus Actions

Enter the description for how bonus actions work for your monster here.

Reactions

Counterspell

 

Legendary Actions
The Amalgamation of Want can take 2 legendary actions, choosing from the options below. Only one legendary option can be used at a time and only at the end of another creature's turn. The Amalgamation of Want regains spent legendary actions at the start of its turn.
 

Absorb and expand (Costs 1 Actions). Due to its corrosive nature, it can absorb one nearby object and gain +3 AC bonus for 1 minute, only one object can be absorb at a time.

Pseudopod Slash (Costs 1 Actions). The Amalgamation of Want makes one Pseudopod Slash attack.

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

A large shifting metallic mass from an unknown entity. Its body is continuously shifting from the souls it has absorbed as it moves with the exception of its bladed right arm. It seeks to absorb all of existence into its form.

When defeated the Amalgamation of Want will be shunted back out of existence leaving no trace of its existence. 

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.

MadHat