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.
John Constantine (DC Comics/Vertigo) is able to use a magic ability called "synchronicity wave travelling", which increases his luck exponentially.
Jinx (Teen Titans/DC Comics) power of bad luck, which manifests as pink, lightning-like energy blasts/waves fired from her hands.
Scarlet Witch (Marvel Comics) is a mutant with the power to manipulate probability. After training to use magic by Doctor Strange, she was able to use her powers on a near cosmic scale through the use of chaos magic.
Wiccan (Marvel Comics) inherited the ability to wield Chaos Magic from his spiritual mother the Scarlet Witch, which allows him to cast spells which can alter probabilities and manipulate reality.
The Ladybug and Cat Miraculouses (Miraculous: Tales of Ladybug & Cat Noir) 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.
Cat Noir (Miraculous: Tales of Ladybug & Cat Noir) has the power of "Cataclysm", a bad-luck based superpower that causes whatever he touches to corrode, disintegrate, or malfunction.
On top of having Cat Noir's appearance, Copycat (Miraculous: Tales of Ladybug & Cat Noir) can also utilize his "Cataclysm" ability.
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.
Silver Bell (Valkyrie Crusade) is a mage that brings good luck and happiness.