Just before the event can occur, you blast the triggering creature with lightning, forcing it to make a Dexterity saving throw. The target takes 10d8 lightning damage on a failed save, or half as much on a successful one.
A target that fails the saving throw must make an additional Constitution saving throw. On failed save, the action or effect that triggered this spell is foiled. Any spell slots or abilities that the target would have been expended are still expended. The target's speed is also reduced to 0 feet for the rest of the turn, and if it is the target's turn, the turn ends immediately. On a successful save, none of the aforementioned effects are activated.
At Higher Levels. When you cast this spell using a spell slot of 9th level, the damage dealt increases by 2d8.
* - taken when a creature within range moves, uses an action, bonus action, reaction, legendary action, or interacts with an object
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