Squirt the Oilcan

If Squirt is motionless at the start of combat, it has advantage on its initiative roll. Moreover, if a creature hasn't observed Squirt move or act, that creature must succeed on a DC 18 Intelligence (Investigation) check to discern that Squirt is animate.

Squirt doesn't require air, food, drink, or sleep.

Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) bludgeoning damage.

Squirt expends 1 application of boggle oil to create a 10-foot-square puddle of slippery, non-flammable oil on the ground within 5 feet of it. The puddle is difficult terrain and lasts for 1 hour. Each creature that enters the puddle's area or starts its turn there must succeed on a DC 11 Dexterity saving throw or fall prone. Boggles are unaffected by the oil. After it expends all 3 applications, Squirt can't use this action again until its supply of boggle oil is replenished.