Curse of Aging

Your touch inflicts a curse of rapid aging. Make a melee spell attack on a creature within your range. On a hit, the creature becomes weak and enfeebled. They have disadvantage on on all Strength-based attack rolls, ability checks, and saving throws. Additionally, the creature must make a Constitution saving throw at the end of each of their turns. They continue making these saving throws until they acquire three successes or three failures, which need not be consecutive. After three successful saving throws, the spell ends and the creature is no longer cursed.

After each failed saving throw, the curse steadily grows worse. One failed saving throw causes the creature to have disadvantage on Dexterity-based attack rolls, ability checks, and saving throws. A second failed saving throw causes the creature to have disadvantage on Constitution-based ability checks and saving throws. Finally, a third failed saving throw causes the creature to do half damage with all weapon attacks.

The spell ends after a third failed saving throw, but the curse remains until it is removed by remove curse, greater restoration, or a similar effect. If the curse is removed in this way while the creature is still making its saving throws, the spell also ends.