Rafael's Wailing Curse

Casting time: Action - Range: touch - Components: V, S - Duration: 1 minute
The next time the target takes elemental damage, it takes an extra 1d6 of the same type. The target has disadvantage on its next saving throw. After the throw the spell ends. At 5th level, The next attack against the target has advantage and the curse ends. At 11th level the damage raises to 2d6. At 17th level if the target would gain hit points it loses that many hit points instead and the spell ends.