You fill a humanoid creature with such cold that its teeth begin to chatter and its body shakes uncontrollably. Roll 5d8; the total is the maximum hit points of a creature this spell can affect. The affected creature must succeed on a Constitution saving throw, or it cannot cast a spell or load a missile weapon until the end of your next turn. Once a creature has been affected by this spell, it is immune to further castings of this spell for 24 hours.    The maximum hit points you can affect increases by 4d8 when you reach 5th level (9d8), 11th level (13d8), and 17th level (17d8).