You would damage an enemy with a melee weapon attack that you are proficient with.
The attack deals an additional +1d8 + [ magic damage bonus ] damage to that target and automatically causes one arcane affliction, in addition to any of its other effects. The damage type and arcane affliction are determined by your spell source. Until the end of your next turn, any creature that begins its turn adjacent to you takes damage of that type equal to your magic damage bonus.
When you choose an at-will spell, you may choose from the following options.