Lightning Jabber a is lightly-enchanted spear that can be picked up in Act 2 of Baldur's Gate 3. This lightning-damage weapon is off the beaten path, and I definitely missed it on my first playthrough of this massive RPG.
Lightning Jabber location in Baldur's Gate 3
To find this lightning-infused spear, you'll need to have reached the Shadow-Cursed Lands in Act 2. It is located to the north of the cursed town of Reithwin, near the Mausoleum where the Sharan temple is found. It's a little bit north of it, around x: -143, y: 118; I have included a map to help out anyone who needs the help. If you head to the beach to the north, you can find a group of Kuo-Toa fishfolk living in the Curse. They will attack you on sight, so you'll need to defeat them all. After the battle is over, make sure to interact with the body of the Kuo-Toa leader; it will have this staff among its lootable possessions.
Lightning Jabber stats in BG3
The crab claw-shaped Lightning Jabber, as the name suggests, deals 1d4 lightning damage along with its normal piercing damage. It is a Thrown weapon. The Lightning Jabber also has a chance to Shock anything it hits; Shock prevents the inflicted character from making reactions, and they gain Disadvantage on Ability Checks and Saving Throws using Dexterity. It is lightly enchanted, with a weapon enchantment of +1.
For more Baldur's Gate 3, check out Best Backgrounds in BG3 on Pro Game Guides.