One Piece: My Ability Is the Clow Card

In the seas of the New World, war, chaos, and madness run rampant. When Kuro transmigrates, he inherits the legacy of a great archmage and grows stronger step by step. Clow Cards, beasts of the sun, moon, and stars, magic wands, grimoires, and magic towers. Time passes. Kuro earns countless titles across these seas: the supreme and strongest, the eternal mage, and the god who rules over everything. But! The title he’s best known by is still: Mentor!!!