Amorphous. Umori can move through a space as narrow as 1 inch wide without squeezing.

Companion. Umori can only bond with a character if all of their prepared spells share the same school of magic. To keep the bond the character must not prepare spells of a new school of magic unless they change all of their spells to match that new school. (ex. Umori's bonder is a cleric and all of their prepared spells are currently necromancy spells. The cleric wants to prepare some enchantment spells. The cleric can do this, but they must prepare all of their spells to be enchantment spells..)

Crystal Hoarder. Umori keeps with it a small collection of crystals. While Umori is within 60 ft. around, there will always a crystal/mutation roll.

Empowered Casting. When Umori's bonder casts a spell, the spell is cast as if at a higher level. (ex. Umori's bonder spends a 3rd level spell slot to cast fireball, however the spell and it's affects are cast as though a 4th level spell was spent. However, if the spell was to be countered, the fireball would still be considered being 3rd level.)

Legendary Resistance (1/day). If Umori fails a saving throw it can choose to succeed instead.

Pseudopod. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 4 (2d4 -1) bludgeoning damage plus 13 (2d6 + 6)  acid damage.