Amnestic Cloud. SCP-939 emanates a cloud of undetectable gas within a 10ft radius. When a creature enters this area for the first time, it must make a DC 12 Constitution Saving throw or else become paralyzed for 1 minute. The creature can repeat this save at the end of their turn. ending the effect on a success. If a creature succeeds, they are immune to the effect for 24 hours. If they fail the saving throw a second time, they lose their memories of the last 24 hours.

Mimicry. SCP-939 can mimic sounds it has heard, including voices. A creature that hears the sounds can tell they are imitations with a successful Wisdom (Insight) check opposed by this creature’s Charisma (Deception) check once within 60ft of the creature

Pack Tactics. SCP-939 has advantage on attack rolls against a creature if at least one of its allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack. The SCP-939 makes two bite attacks.

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 24 (3d12 + 5) piercing damage.