The user is able perform a form of magic that allow the user to cast magical spells feats through luck. They can use different spells to change the probability of an outcome, increase their own chances of winning, cause a mistake to happen to the opponent and so on.
The Ladybug and Cat Miraculouses (Miraculous Ladybug) are magical artifacts that grant the users power over the forces of creation and destruction, equating to powers based around good luck and bad luck respectively.
Chat Noir (Miraculous Ladybug) has the power of "Cataclysm", a bad-luck based superpower that causes whatever he touches to corrode, disentigrate, or malfunction.
Ontop of having Chat Noir's appearance, Copycat (Miraculous Ladybug) can also utilize his "Cataclysm" ability.
Jinx (Teen Titans) is an enchanting sorceress who wields the power of bad luck, which manifests as pink, lightning-like energy blasts/waves fired from her hands.
The Rabbit's Foot (Supernatural) is a cursed object that grants those that wield it absurdly powerful good luck. When they lose the foot, their luck becomes so horrible that it kills the former user within 24 hours.