Talk:Outsider's Mark/@comment-80.7.97.231-20141230122913/@comment-27689364-20141230152828

It's a gameplay mechanic. Piero's Spiritual Remedy and Sokolov's Elixir are both canonically anti-plague elixirs used to ward off the rat plague. Mechanically, they are used to replenish 'mana' and 'health' respectively.

It's also worth noting that in the opening cutscene of The Knife of Dunwall, Daud uses Blink three times consecutively, obviously not caring about whether or not he was running out of 'mana'.