|Release date||24 August 2015 (Update)|
|Drain rate||300 points per minute (1 point per 0.2 seconds)|
|Effect||Doubles the chance of ancient spell effects activating when using abilities.|
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Dark Form is a Seren prayer that can be used after completion of The Light Within. It doubles the chance for the Shadow, Smoke, Ice, or Blood spells' effects to activate when using abilities. It requires 80 Prayer and is the opposite of Light Form.