Cursed Luckstone

(requires attunement)
•While carrying the stone, you can gain advantage
on one ability check of your choice. The stone
can't be used this way again until the next dawn.
•This item is cursed. Attuning to it curses you
until you are targeted by a remove curse spell or similar magic. After you use the stone's magic,
your next two ability checks are made with disadvantage.