Shiver

Evocation cantrip   Casting time: 1 action   Range: 30 feet   Target: a humanoid creature within range   Components: V, S, M (humanoid tooth)   Duration: 1 round   Classes: Druid   Subclasses:  
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 hi points of a creature this spell can affect. The affected creature must succeed on a Constitution saving throw or it cannot casdt a spell or load a missile weapon until the end of your Next turn. Once a creautre has suffered the effects of this spell, it is immune to the effects 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)