Demon Affinity

Adding a Black Lens or a Demon Scythe to the affinity slot of the Forging Interface will result in your item gaining the demon affinity. This will increase your critical strike chance against demonic monsters* by 50% at the cost of decreasing your weapons DPS by 2%.

* All monsters with "Demon", "Eye" or "Diabolist in their name are counted as demonic monsters.