Philosopher's Stone

The Philosopher's Stone is a Hardmode Accessory that reduces the 1 minute Potion Sickness debuff cooldown time by 15 seconds, so that the cooldown is only 45 seconds. Essentially this means that most regenerative Potions can be used more often. It is dropped by Mimics.

Trivia

 * Philosopher's Stone is a material in alchemy that lets a person change one material into another with any regard to the substances in the materials. For example, you could turn dirt into gold or create life out of nothing. It was also said to grant immortality. In alchemy the color crimson represents the stone.