[Greek Mythos] Thunderbolt of Zeus (Patreon)

Weapon (javelin), uncommon (requires attunement)

Crackling with unbridled power, this fearsome weapon thrums in its wielder's hand and causes the hair of nearby creatures to stand on end. Through the power of the god of the skies, the javelin is solid to the touch despite being made of pure lightning.

This javelin deals lightning damage instead of piercing damage, and reforms in your hand immediately after you make a ranged attack with it or use the Galvanic Slam property.

Galvanic Slam. When you take the Attack action on your turn, you can replace one of your attacks with a shockwave of electricity.  You slam this javelin on the ground at your feet and each creature within 10 feet of you must succeed on a DC 13 Constitution saving throw or take 2d6 lightning damage.

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Rare variant: Increase the save DC of Galvanic Slam to 15 and its lightning damage to 2d8. The item has the Lightning Rod property.

Lightning Rod. While holding this javelin, it absorbs a small portion of all electricity directed at you. Lightning damage that you take from any source is reduced by 3. When the javelin reduces damage in this way, it becomes supercharged, and the next attack you make with it before the end of your next turn deals an extra 2d8 lightning damage.

Very rare variant: Increase the save DC of Galvanic Slam to 16 and its lightning damage to 2d8. The item has the Lightning Rod and Wrath of the Sky God properties.

Wrath of the Sky God. While holding this javelin, you can cast the call lightning spell from it (save DC 16). Once this property is used, it can’t be used again until the next dawn.

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