Three times a long rest, a player may attempt to contain an item or a creature in The Square Hole of Containment by saying "That's Right! It goes in the Square Hole!" for the cost of one action. A Persuasion (CHA) check of 15 must be passed for objects measuring bigger than 5 ft x 5ft x 5ft or weighing heavier than 50 lbs. Objects smaller than this automatically succeed and enter the Square Hole. Creatures at risk of the Square Hole must succeed on a DC 10 Charisma saving throw or be consumed by the square hole. Creatures captured by The Square Hole of Containment remain frozen in time in a state of unconsciousness until being removed from The Square Hole of Containment.

A player or creature holding The Square Hole of Containment may remove a random creature or object from the Square Hole using one bonus action. The player or creature have no control on whether they remove an object or a creature. When a creature is removed from The Square Hole of Containment they reenter this plane of existence having taken a long rest. When an object is removed from The Square Hole of Containment it reenters this plane of existence in the state it left it. If the object has charges that reset at a long rest or sunrise, it reenters this plane with full charges.