No modifiers (stats remain same as Slime form, must have an Int of 18+ to use)
Telepathy: You cannot speak normally, but you can telepathically speak to any creatures you can see within 120 feet of you. You don’t need to share a language with the creature for it to understand your telepathic messages, but the target(s) must be able to understand at least one language or be telepathic itself.
Age: Illithids have no set age range for maturity; rather it is determined by size. The upper age limit of Illithids is unknown.
Amorphous: Due to the fluid nature of your form, you can move through a space as narrow as 1 inch without squeezing. You leave behind any items you are carrying, and any equipment which you are proficient with merges into your form until you exit the space.
Adhesive: Being a creature of gelatinous slime you are naturally sticky. You have advantage on Athletics checks made to grapple a target. In addition, you can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. You are also immune to fall damage.
Undefinable State of Being: While you are explicitly alive, you are neither animal, plant or fungus. Your description is Ooze. You do not need to sleep or breathe and cannot be Blinded, Deafened or knocked prone. You also take half damage from Bludgeoning or Slashing but due to the nature of your being you are vulnerable to Piercing.
Elemental Natural Weapons: Your physical form is imbued with elemental power, so your unarmed attacks do their damage. Your elemental damage is the same as for your previous form. Your unarmed attacks do 1d4+Con of damage in that element rather than the normal Bludgeoning.
Elemental Immunity: You are immune to damage caused by the element of your Natural Weapons.
Dehydration: You have disadvantage to all rolls when in extreme heat.
Brain Drain: If your Int is decreased below 18, you revert to your Slime stat block. When it returns to 18 or above, you return to using your Illithid stat block. All of your other stats remain the same.
Extremely Slow: Due to your increased bodily density you can no longer move as fast. Your movement speed is 15ft.
Psionics: You have an internal reservoir of energy dedicated to your formidable psychic abilities. You have a number of PSI points equal to your overall Level + your Int modifier, and can use an amount equal to your overall Level to produce the effect of any one of the spells on the following list at any one time. Your PSI points recover completely after a long rest.
- Start - Encode Thoughts (2 PSI)
- Start - Catapult (2 PSI with an additional 1 per 5lbs of object)
- 2nd - Disguise Self (3 PSI)
- 4th - Detect Thoughts (2 PSI with an additional 1 per target)
- 6th - Phantasmal Force (4 PSI)
- 8th - Arcane Eye (4 PSI)
- 10th - Dominate Beast (5 PSI)
- 10th - Hallucinatory Terrain (6 PSI)
- 10th - Dominate Person (6 PSI)
- 12th - Wall of Force (7 PSI)
- 14th - Mass Suggestion (10 PSI)
- 16th - Mental Prison (10 PSI)
- 18th - Dominate Monster (12 PSI)
- 20th - Psychic Scream (14 PSI)