A Dark potion is made by mixing 1x 
Necroti busi, 1x 
Alliuminatiand 1x 
Noilednad in a potion stand requiring the player to have level 69 in the Herblore skill and making it awards the player 204 experience points in the skill.
Consuming this potion gives the player a +20% armour penetration bonus against enemies for 6 minutes.