- Sold by Greirat of the Undead Settlement when he returns from his pillaging journey to Irithyll of the Boreal Valley.
- Sold by the Shrine Handmaid if given Greirat's Ashes, provided that he returned successfully from his first pillaging journey.
- Ten bolts can be found in the Irithyll Dungeon, on a wooden roof only accessible by climbing a ladder located near the Mimic that drops Dragonslayer Lightning Arrows, in a small passage near the feet of the chained Giant Slave.
Lightning Bolts inflict lightning damage, dealing additional damage to most enemies, especially those which are weak to this element. Likewise, the additional damage is greatly reduced on enemies resistant to lightning.