Shadow spider

The Shadow spider is a level 52 monster. If a player is attacked by this monster, it will drain their Prayer points by half of the current amount, rounded down. They can never take away a player's last prayer point. When players reach a combat level of 105, they cease being aggressive, unless they are found in the Wilderness. Several of these monsters hang around near the entrance of the Waterfall Dungeon. They do not show on the mini map.

Locations

 * Waterfall Dungeon
 * Deep Wilderness Dungeon
 * Chaos Tunnels

Trivia

 * Sometimes a glitch occurs involving the Spider's prayer draining ability. If you got a random event, and manage to complete it, the spider can continuously drain your Prayer even without it attacking, until it is 1. The speed of it is 3 drains per second.