You invoke the darkest curses upon your victim and his or her descendants. This spell does not require that you have a clear path to your target, only that your target is within range. Your target must make a successful Wisdom saving throw or be cursed until the magic is dispelled. The victim has disadvantage on ability checks and saving throws made with the ability score that you choose when you cast the spell. In addition, the target's firstborn offspring is also targeted by the curse. The firstborn is allowed a saving throw of their own if they currently live, or they make one upon their birth if they're not yet born when the spell is cast. If the target's firstborn has already died, the curse passes to their next oldest offspring.