Wassellipse

Wassellipse is an amoeba-like Celloid with a purple brain, green eyes, and a blue, watery body. It has control over water, and can significantly alter its body temperature, which allows it to use the Sou and Steam elements.

Physiology
Wassellipse has a simplistic design, being an ovular blob with a blue, translucent, slimy body, a purple brain, and bright green eyes. It has a large, dark blue crest on its head, and its body forms long, watery appendages when stimulated by electrical impulses.

Ecology
Wassellipse has a large crest on its head made of solid, rigid gel that it uses to head-butt foes, and feeds on objects by absorbing them with its body and dissolving them through contractions that break them down. Like other Celloids, it has no bones, allowing it to take any shape it wants, and has unique nerves that form limbs when stimulated by electrical impulses sent by the brain. Approximately 90% of its body is water, so it thrives in wet habitats such as the Deserted Island and the Flooded Forest, for dry habitats such as the Desert and Volcano can cause it to become dehydrated, and absorbs water with its body in order to stay hydrated. It has the ability to drastically alter its body temperature by sending signals from its brain to its body, either raising it to point where the water it uses turns into steam or lowering it to the point where the water it uses can cause frostbite on contact, which allows it to use the Steam and Sou elements, respectively. It has three different forms depending on how high its body temperature is, each with their own strengths and weaknesses: Normal Form, which is balanced in terms of stats, Cold Form, which is vulnerable to heat and moves slower, but makes up for it with increased attack power, defenses, and resistance to cold, and Heat Form, which is vulnerable to cold and makes it become exhausted at a faster rate, but makes up for it by increasing its movement speed, attack power, and resistance to heat. It likes to eat fruit and vegetables due to the large amounts of water found within them, and competes with other herbivores such as Epioth, Slagtoth, Diablos, and Duramboros for food. It faces predation from larger monsters such as Rathian, Plesioth, Nargacuga, Rathalos, Lagiacrus, Zinogre, Gore Magala, and Zenaserisu, who like to eat its brain as it is high in nutrients and fat, but it is capable of defending itself through the use of ice-cold and scalding-hot water.

Behavior
Wassellipse is territorial, and does not like outsiders intruding on its territory, relentlessly attacking them with water blasts, punches, grabs, and crushing jumps until they leave or die. However, it does know its limits, and it will morph into a puddle and flee if outmatched.

Abilities
Wassellipse has the ability to use the Water element in battle, and has direct control over its body temperature, which allows it to convert its Water attacks into Steam and Sou attacks. It can form long appendages with its body that can strike foes from afar, and its hard crest can be used as a club.

Habitat
Wassellipse lives in areas with large amounts of water such as the Deserted Island and the Painted Waterfalls.

Attacks
Bounce

Wassellipse bounces towards the hunter five times in a row, attempting to crush them with its body. This attack deals medium damage and has a homing effect.

One-Two Punch

Wassellipse forms a pair of arms with its body, envelops them with water, then sends them towards the hunter, starting with a jab with one arm and finishing with a sideways swing with the other arm. This attack deals medium damage and will blow a hunter across the area if the punches connect. When in any of its two forms, its damage output will increase, and it will either inflict Fireblight (Heat Form) or Iceblight (Cold Form).

Stretching Head-butt

Wassellipse lifts its head into the air, envelops its crest with water, then swings it at the hunter twice in a row, stretching its body outwards in order to increase its chances of hitting the hunter. This attack deals medium-high damage, inflicts Waterblight, and will knock down any hunter it hits. When in any of its two forms, its damage output will increase, and it will either inflict Fireblight (Heat Form) or Iceblight (Cold Form).

Puddle Jump

Wassellipse morphs into a puddle, then quickly moves towards the hunter, trying to get under their feet. If it succeeds, the hunter will slip, and it will shift back into its regular form and jump high into the air, dealing medium-high damage and sending the hunter flying into the air.

Merry-Go-Round Punch

Wassellipse forms four arms with its body, envelops them with water, then spins them around while moving itself towards the hunter, stretching them out in order to increase its chances of hitting them. This attack deals high damage and inflicts Waterblight. When in any of its two special forms, its damage output will increase, and it will either inflict Fireblight (Heat Form) or Iceblight (Cold Form).

Pressure Blast

Wassellipse presses itself downwards, releasing four large water balls from its body that fly out from all of its sides. This attack deals medium damage and inflicts Waterblight. When in any of its two special forms, its damage output will increase, and it will either inflict Fireblight (Heat Form) or Iceblight (Cold Form).

Long-Range Grapple

Wassellipse forms one long arm with its body and swings it at the hunter in an attempt to grab them with it. If it connects, it will grab the hunter, hoist them into the air, then slam them onto the ground, dealing high damage.

Steam Twister

Wassellipse leaps back and releases a large tornado made of steam from its body that flies towards the hunter. This attack deals high damage, inflicts Waterblight and Fireblight, and sends the hunter flying into the air. It will only use this attack when it's in its Heat Form.

Freezing Rain

Wassellipse stores energy, then launches a massive ball of freezing water into the air that explodes afterwards, releasing large droplets of freezing water that fall back to earth. This attack deals high damage and inflicts Waterblight and Iceblight. It will only use this attack when it's in its Cold Form.

Long Sword
Kanade Katana --> Kanade Kingblade

Hunting Horn
Scalding Calliope --> Sacred Calliope

Switch Axe
Steam Halberd --> Steam Executioner

Charge Blade
Hydraulic Blade --> Hydraulic Baron

Insect Glaive
Vaporous Glaive --> Vaporous Grandmaster

Light Bowgun
Frigid Rifle --> Liquid Nitrogen Rifle

Heavy Bowgun
Hydrokinetic Cannon --> Hydrokinetic Calamity

Low-Rank
Defense: 100-610

Elemental Resistances:
 * Fire -5
 * Water +30
 * Thunder -25
 * Ice -5
 * Dragon -5
 * Earth +10
 * Wind -15

Skills: Polar Hunter, Tropic Hunter, Water Res +15, Short Sprinter

High-Rank
Defense: 275-620

Elemental Resistances:
 * Fire -5
 * Water +30
 * Thunder -25
 * Ice -5
 * Dragon -5
 * Earth +10
 * Wind -15

Skills: Polar Hunter, Tropic Hunter, Water Res +15, Short Sprinter

G-Rank
Defense: 430-685

Elemental Resistances:
 * Fire -5
 * Water +30
 * Thunder -25
 * Ice -5
 * Dragon -5
 * Earth +10
 * Wind -15

Skills: Polar Hunter, Tropic Hunter, Water Res +20, Short Sprinter

Low-Rank
Defense: 50-380

Elemental Resistances:
 * Fire 0
 * Water +35
 * Thunder -20
 * Ice 0
 * Dragon 0
 * Earth +15
 * Wind -10

Skills: Polar Hunter, Tropic Hunter, Water Res +15, Short Sprinter

High-Rank
Defense: 140-400

Elemental Resistances:
 * Fire 0
 * Water -10
 * Thunder -20
 * Ice 0
 * Dragon 0
 * Earth +15
 * Wind -10

Skills: Polar Hunter, Tropic Hunter, Water Res +15, Short Sprinter

G-Rank
Defense: 230-445

Elemental Resistances:
 * Fire 0
 * Water +35
 * Thunder -20
 * Ice 0
 * Dragon 0
 * Earth +15
 * Wind -10

Skills: Polar Hunter, Tropic Hunter, Water Res +20, Short Sprinter

Breakable Parts
Crest- The crest will break off.

Trivia

 * Wassellipse's name is a combination of wassel, which is German for "water", and ellipse, which refers to ovular shapes.
 * Wasselipse's design was partially based on Morpha from The Legend Of Zelda: Ocarina of Time and Chaos from Sonic Adventure.
 * Wassellipse will only go into its Heat Form and Cold Form when enraged, and it has a 50% chance of activating either one.
 * Wassellipse's crest will deflect Blademaster weapons with sharpness levels lower than blue, and normal bullets and arrows will bounce off it.
 * Wassellipse's Long Sword and Charge Blade use the Sou element while its Hunting Horn, Switch Axe, and Insect Glaive use the Steam element. Its Light Bowgun and Heavy Bowgun can use Flaming Shots, Water Shots, and Freeze Shots, but cannot use Thunder Shots, Dragon Shots, Earth Shots, or Wind Shots.
 * When exhausted, Wassellipse's physical attacks will take longer to execute. It can recover stamina by feeding on berries and herbs in the area around it.