How To Get Arclight In OSRS: Complete Guide

Arclight is one of the strongest demonbane weapons in Old School RuneScape, requiring 75 Attack to equip. It’s the enhanced form of Darklight and stands out for its incredible effectiveness against demonic creatures, giving players extra damage, accuracy, and utility during combat. Its speed and reliable special attack make it a staple choice for Slayer tasks, boss fights, and general demon hunting. In this guide, we’ll walk you through everything you need to know about how to obtain Arclight in OSRS so you can add this powerful weapon to your arsenal.

How To Get Arclight In OSRS

To get Arclight in OSRS, you’ll need to upgrade Darklight by using three Ancient Shards at the altar found in the middle of the Catacombs of Kourend. Once combined, Darklight is permanently transformed into Arclight, making it far more powerful against demons. If you ever lose the weapon, you can reclaim Darklight from Sir Prysin for a small fee of 1,000 coins, then repeat the upgrade process with another three Ancient Shards to craft Arclight again.

Arclight Stats Overview

Arclight’s power depends on whether it’s charged or not, with each state offering different strengths. When uncharged, the weapon leans toward higher raw strength but comes with slower attack speed, making it less effective for consistent DPS. Once charged, however, Arclight shines—its slash accuracy jumps considerably, attack speed becomes quicker, and it maintains solid bonuses, making it incredibly reliable against demonic foes.

Uncharged: +13 Strength, 5-tick speed (3.0s), +16 Slash bonus — more raw strength but noticeably slower.
Charged: +8 Strength, 4-tick speed (2.4s), +38 Slash bonus — faster swings with excellent accuracy, perfect for demon slaying.

Special Attack

Arclight keeps the same special attack as Darklight, called Weaken, which uses 50% of your special attack energy. When activated, it lowers an enemy’s Attack, Strength, and Defence stats by 5% of their base level plus 1. This effect is even stronger against demons, cutting their stats by 10% plus 2 instead. Unlike the Dragon Warhammer, which applies reductions multiplicatively, Arclight’s debuff stacks additively, meaning repeated successful uses of Weaken can cripple even the toughest demonic bosses over the course of a fight.

Mechanics and Passive Effect

Arclight comes with a powerful passive effect that makes it especially deadly against demonic creatures. When used, it increases both accuracy and damage by 70% against monsters such as Abyssal Demons, Black Demons, Greater Demons, and even bosses like K’ril Tsutsaroth. The only exception is Duke Sucellus, who only receives 30% of the usual bonus. Even with this limitation, Arclight remains one of the best weapons in Old School RuneScape for demon hunting, offering unmatched consistency and damage output in demon-heavy content.

Infusion Mechanic and Upgrading

Every hit with Arclight contributes to its infusion mechanic, where 10,000 charges equal a full 100% infusion. This system becomes crucial when upgrading Arclight into Emberlight, a superior version of the weapon. To perform the upgrade, players need level 74 Smithing, Duradel’s notes, and a Tormented Synapse. The upgrade can only be done on a fully charged or fully infused Arclight. Once transformed, Emberlight boasts higher combat stats and the major advantage of being a non-degrading weapon, making it a permanent and more reliable upgrade for long-term use.

Conclusion

Arclight stands out as one of the best demonbane weapons in OSRS, offering both power and utility for anyone taking on demonic foes. From its strong passive bonuses to its useful special attack, it’s a must-have for players who regularly fight demons in places like the Catacombs or God Wars Dungeon. With the ability to recharge it using Ancient Shards and even upgrade it into Emberlight for permanent power, Arclight is a weapon worth investing in for the long run. Whether you’re a seasoned player or progressing toward endgame PvM, unlocking and mastering Arclight will make your demon-hunting journey far more effective.