Pact of the Toll

Your patron gifts you a bell of immense eldritch power called a Bell of Dissension. The bell functions as an arcane focus and allows you to create various magical effects. The bell has three charges and regains all expended charges when you finish a short or long rest.

As a bonus action, you can toll the bell and expend 1 charge. When you do so, the next time you damage a creature or object with a spell during the same turn, you gain resistance to the type of damage you inflicted until the end of your next turn.

If you lose your Bell of Dissension, you can perform a 1-hour ceremony to receive a replacement from your patron. This ceremony can be performed during a short or long rest, and it destroys the previous bell. The bell tolls on its own for 1 minute when you die, at the end of which it dissipates into a pile of fine, metallic dust.