The Zaros hilt is a rare drop from Lord Shadowcore in the God Wars Dungeon. When attached to a completed Godsword blade, which can be created by combining the three Godsword shards, it creates the Zaros godsword, which enables the player to use the special attack Merciless Soul. This special attack can only be used if you have level 50 prayer or above, as well as 100% prayer points, and are currently fighting an opponent (Player or monster). When used, it doubles all of your hits, until you either kill your target, or stop attacking the target. This attack drains 100% of your special attack bar, and drains all of your prayer points as a price.