Philosopher's Stone

The Philosopher's Stone is an accessory item dropped by the Mimic. It reduces the 1 minute Potion Sickness debuff cooldown time by 15 seconds so that the cooldown is only 45 seconds.

Trivia

 * The philosopher's stone is a legendary alchemical substance, typically believed to turn certain metals into gold and create an elixir that provided eternal life.
 * Also possibly a reference to Full Metal Alchemist where the philosopher stone is something much sought after by the main characters in the series.