Wondrous Item, rare
This grenade is used to cause confusion among spellcasters.
As an action, you can throw the grenade to an area within 60ft of you causing a 30ft. radius of wild magic. For the next minute, all spells cast at 1st level or higher must roll on a wild magic table when cast inside the area.
This item is rendered non magical after it is used.
Notes: Consumable
I foresee a lot of mayhem with this :)
https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/89876-extended-wild-magic-table