Rune of Animation (5e Trap)
From D&D Wiki
Rune of Animation
A small dull hidden rune on the ground marks the trap. The DC to spot the rune is 15. The trap itself lies in a 15-foot spherical field of force projected in the air. If anything walks into the force the trap will instantly activate animating up to 10 Medium or smaller objects or 5 Large objects within 30 feet of the trap.
The trap can be disabled by three successful DC 15 Intelligence (Arcana) checks or one successful dispel magic (DC 13).