Adult OblexMedium ooze
Amorphous. The oblex can move through a space as narrow as 2 centimeters wide without squeezing.
Aversion to Fire. If the oblex takes fire damage, it has disadvantage on attack rolls and ability checks until the end of its next turn.
Spellcasting. The adult oblex uses Psionics (Int) to cast spells (spell save Difficulty 15, +7 to hit with spell attacks). It has 5 mana, a mana limit of 1, regains all expended mana when it finishes a long rest and regains half its total mana (rounded up) when it finishes a short rest. It knows the following spells:
Pseudopod. Melee Weapon Attack: +7 to hit, reach 1 m. Hit: 7 (1d6 + 4) bludgeoning damage plus 5 (2d4) psychic damage.
Eat Memories (1/turn). The oblex targets one creature it can see within 1 meter of it. The target must succeed on a Difficulty 15 Will saving throw or take 18 (4d8) psychic damage and become memory drained until it finishes a short or long rest or until it benefits from the greater restoration or heal spell. Constructs, oozes, plants, and undead succeed on the save automatically.
While memory drained, the target must roll a d4 and subtract the number rolled from any ability check or attack roll it makes. Each time the target is memory drained beyond the first, the die size increases by one: the d4 becomes a d6, the d6 becomes a d8, and so on until the die becomes a d20, at which point the target becomes unconscious for 1 hour. The effect then ends.
When an oblex causes a target to become memory drained, the oblex learns all the languages the target knows and gains all its proficiencies, except for any saving throw proficiencies.
Sulfurous Impersonation (1/turn). The oblex can extrude a piece of itself that assumes the appearance of one Medium or smaller creature whose memories it has stolen. This simulacrum appears, feels, and sounds exactly like the creature it impersonates, though it smells faintly of sulfur. The oblex can impersonate 1d4 + 1 different creatures, each one tethered to its body by a strand of slime that can extend up to 20 meters away. For all practical purposes, the simulacrum is the oblex, meaning that the oblex occupies its space and the simulacrum’s space simultaneously. The slimy tether is immune to damage, but it is severed if there is no opening at least 2 centimeters wide between the oblex’s main body and the simulacrum. The simulacrum disappears if the tether is severed.
No concoctions, maneuvers, or spells
All creatures in this system should have maneuvers or spells. You should add some maneuvers or spells to this creature. If you do so, please make a suggestion on github so I can finish adding maneuvers and spells to all creatures via https://github.com/mlenser/kryx-rpg-issues/issues/9.