Dementors experienced the chance to actually devour many of the happiness from the whole world all over them, leaving people with only their worst encounters, resulting in a state of misery and hopelessness. Regeneration potion A potion observed by Lord Voldemort to be "an previous piece of Dark Magic".[6] https://blackmagicspells27799.elbloglibre.com/29497129/the-2-minute-rule-for-black-magic-spells