Magic Resistance. The eddy has Advantage on saving throws against spells and other magical effects.
Multiattack. The eddy makes two attacks, using Searing Swipe or Arcane Bolt in any combination.
Searing Swipe. Melee Attack Roll: +6, reach 10 ft. Hit:13 (3d6 + 3) Fire or Lightning damage (eddy's choice).
Arcane Bolt. Ranged Attack Roll: +6, range 120 ft. Hit:14 (2d10 + 3) Force damage.
Eldritch Overload. Trigger: The eddy takes damage. Response—Strength Saving Throw: DC 14, each creature of the eddy's choice in a 5-foot Emanation originating from the eddy. Failure: 7 (2d6) Force damage, and the target has the Prone condition.
When magical energy becomes dangerously unstable, it sometimes animates into an eldritch eddy: an uncontrolled whirlwind of Evocation magic that crackles with fire and lightning. Eldritch eddies typically arise where magic use is heavy and irresponsible, such as near a fanatical mage's sanctum, a workshop that churns out magic items, or a library where undertrained scribes work with Spell Scrolls. Eldritch eddies are common in ancient Netheril near the homes and workplaces of famous mages.