Arcane Grenade

You create a small explosive ball of electricity charged to critical mass and then hurl it at a point within 150 feet. Upon impact, it detonates in a burst of lightning, dealing 8d6 lightning damage to all creatures in a 20-foot radius sphere centered on that point. Each creature in the area must make a Dexterity saving throw. On a failed save, a creature takes full damage, and on a successful save, it takes half damage.

Additionally, the electrical burst has the power to restrain knocked-down enemies. Creatures that are reduced to 0 hit points within the area of effect are automatically restrained until they can make a successful Strength saving throw to free themselves.

At Higher Levels: When you cast this spell using a 4th-level or higher spell slot, the damage increases by 1d6 for each slot level above 3rd. The size of the area of effect remains the same, but the damage scales with the spell slot level.