This large, greenish stone is scribed with runes of Abjuration. As an action, it can be thrown up to 30 feet and explodes in a 10-foot-radius sphere of magical energy on impact, destroying the stone.

Choose one creature, object, or magical effect within the sphere. Any spell of 3rd level or lower on the target ends. For each spell of 4th level or higher on the target, make an ability check using your spellcasting ability. The DC equals 10 + the spell's level. On a successful check, the spell ends.

(The effect is identical to the spell dispel magic.)