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

Magic resistance. The ooze has advantage on saving throws against spells and other magical effects.

Magic absorption. If the ooze succeeds on a saving throw against a spell's effect, or a spell attack misses it, it regains hit points equal to four times the level of the spell slot used to cast it (cantrips count as level 1 for this purpose). Additionally, if the ooze successfully hits a creature with its pseudopod attack, that creature must make a DC 12 Constitution saving throw. On a failure, that creature loses its lowest level spell slot available (it counts as expanded), and the ooze regains hit points equal to four times that spell slot's level.

Pseudopod. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage plus 6 (2d6) acid damage.