An incense thurible made of intertwining bronze mobius strips that seem to move as you look upon them. Incense floats within, visibly burning, but not smoking.

Once per long rest you may choose a non-ritual spell from your class spell list to infuse within the thurible. The chosen spell must be at least level 1 and may be up to 1 spell level greater than your highest level spell slot. (For example, a caster with 2nd level spell slots may choose a 1st, 2nd, or 3rd level spell.)

The chosen spell may be cast using the thurible as a spellcasting focus as though it were a ritual spell once per long rest. When you cast a spell this way that you could otherwise cast with a spell slot, you may increase the potency of the spell by one level, if applicable. 

When you cast a spell with the Thurible that you could not otherwise cast with a spell slot, make a Constitution Saving Throw with a DC equal to 10 + the spell's level. On a failure, the spell fails and you gain one level of exhaustion. 

Notes: Spellcaster, Spellcaster, Utility