Javelin of Lightning · World Build Compendium

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Image promptslender iron-tipped javelin, weather-cracked dark ash shaft, worn leather binding, spearhead etched with jagged branching lightning channels, faint scorch streaks, very faint flickering blue-white shimmer along the head, uncommon subtle aura, object study, slight angle, hard directional light, dark neutral backdrop, dark fantasy, grimdark, painterly digital art, dramatic chiaroscuro lighting, muted desaturated palette with corrupted-crimson accents, weathered post-Cataclysm atmosphere, intricate high detail, cinematic composition

Weapon (Javelin), Uncommon

Each time you make an attack roll with this magic weapon and hit, you can have it deal Lightning damage instead of Piercing damage.

Lightning Bolt. When you throw this weapon at a target no farther than 120 feet from you, you can forgo making a ranged attack roll and instead turn the weapon into a bolt of lightning. This bolt forms a 5-foot-wide Line between you and the target. The target and each other creature in the Line (excluding you) makes a DC 13 Dexterity saving throw, taking 4d6 Lightning damage on a failed save or half as much damage on a successful one. Immediately after dealing this damage, the weapon reappears in your hand. This property can't be used again until the next dawn.