The Elder Scrolls Online: Ravage Magicka

Ravage Magicka Potion description: Increases the cost of Magicka abilities by 60% for [X] seconds. (45 second cooldown) Poison description: Increases the cost of your victim’s Magicka abilities by 60% for [X] seconds. (10 second cooldown) The Ravage Magicka effect increases the cost of all your Magicka-based abilities, or in a Poison does the same