Visvern's Elemental Totem

You summon a glowing totem with an AC of 13 and 50 hit points at a spot that you can see within 30 feet of you to protect you, lasting for 1 minute. When you prepare this spell at the beginning of the day choose one of the following damage types: Fire, Cold, Lightning, or Acid. For the remainder of the time that the spell is prepared that damage type is the one used. After you cast the spell, choose a creature type to target, and once per round on your turn, the totem shoots one ball of the selected damage at every creature of the specified type. (Ex. if you choose undead then only undead will be shot at and other enemies will be left alone. Keep in mind that if you're fighting bandits and choose humanoid then the totem will target your party). Each ball of elemental destruction hurled at your foes deals 5d8 damage on a hit using your spellcasting attack modifier.