Wild Magic Zone

A past magical disaster or uncontrolled surge of power in a particular place can cause the fabric of magic to unravel, creating a wild magic zone. In such an area, which is typically no more than 300 feet in diameter, magic behaves unpredictably.

Whenever a creature expends a spell slot to cast a spell in a wild zone, roll 1d20. For every spell slot used when casting a spell the value threshold increases to roll on the Wild Magic Surge table to create a magical effect. For example, if a 3rd level spell slot is used, 1-3 on the d20 will start an effect on the magic table.