Ak'laorl-ryel

Upon a magic circle composed of a damp surface of earth surrounded by a circle of overlayed sticks, you can permanently alter the biology of an organic, immobile humanoid, beast, undead, or monstrosity within the circle. As the ritual is performed, the creature's body will slowly change until it is finished. Along with changes to the body, when this ritual is cast upon someone, it will additionally permanently degrade their mental ability and autonomy. Enough alterations will result in an absolutely mindless creature.

A conscious creature may attempt to resist this with a Constitution saving throw against your spell save DC, but even on a success, they still lose part of their life force.

The following are some examples of changes that can be made to a creature; however, they are not the only options:

• Water Breathing: The creature gains obvious gills allowing them to breathe water.
• Webbed features: The creature gains webbed feet and hands that grant them a swimming speed equal to their walking speed.
• Natural Weapons: The creature grows sharp claws or teeth that deal 1d6 piercing or slashing damage.
• Blubber: The creature's skin alters and greys becoming thicker and puffy. This grants the creature a resistance to cold damage that is useful for surviving low depths.
• Echolocation: The creature's head bulges outward significantly. As an action, they can concentrate on sound waves for up to a minute granting them blindsight to a range of 30 feet.
• Size increase: The creature's size expands as gaps that were not there before are filled in. The creature's size increases by one category.
• Size decrease: The creature's size shrinks as it loses some features of itself. The creature's size decreases by one category.
• Additional Limb: The creature gains the limb of an aquatic creature. This limb cannot hold shields or heavy weapons.
• Shell: The creature gains a shell covering some part of their body. This grants the creature a +1 to their AC.
• Mucus Coating: The creature secretes a continuous mucus that makes it slippery. They have advantage on checks to escape grapples, and opportunity attacks against them are made with disadvantage.
• Suction Cups: The creature grows suction cups on its arms and hands that make it impossible to disarm them.
• Abyssal Eyes: The creature gains fish-like eyes allowing them to see in darkness out to a range of 120 feet.
• Ink Production: The creature's orifices occasionally leak ink. The creature can cast the spells fog cloud and grease at will as long as the area of effect includes or is adjacent to them.
• Camouflage: The creature's skin becomes able to shift color allowing them to blend in with their surroundings. If the creature doesn't move at all, it gains advantage on stealth rolls. When not focusing, their skin rapidly fluctuates in color.
• Boneless: The creature loses all its bones and its body becomes extremely malleable causing it to constantly sway or wabble in unnatural ways. They become able to squeeze through spaces as small as small as 1 inch.

Whenever you finish casting this spell, roll a 20 plus your spellcasting modifier to see how well you perform the ritual. Different affects have different DC's depending on their difficulty. A failed roll may result in additional negative effects as something goes wrong during the casting. This is rolled at disadvantage if the casting is interrupted, but still goes to completion. This roll cannot be modified in any other way.

You may only cause one alteration per casting of this spell. While casting this spell, you must maintain concentration on doing so for the duration of the casting time. If dispelled or if the caster loses concentration during the casting of this spell, the effects will be undone. Once the ritual is completed, however, it will last indefinitely.