Bead of Mirages

Wondrous item, rare

This small grey sphere measures an inch in diameter and weighs an ounce. Typically, 1d4+1 beads of farce are bound together. You may use an action to throw the bead up to 60 feet. The bead explodes on impact and is destroyed. A major illusion spell cast from a 6th-level spell slot appears at the location. You decide upon the illusion prior to the explosion.