Spellburrow

These scarab-like symbionts, bred by the daelkyr Valaara, have brilliant, iridescent shells. To attune to a spellburrow, you must place it on your head; in the process of attunement, it digs in and burrows through your skull, establishing a psychic connection with you. While it lacks any sort of human consciousness, it possesses a strange alien sentience that responds to your desires. There are tales of rarer spellburrows that possess greater knowledge and sentience; such stories sometimes end with the spellburrow consuming the brain of the wizard who pushed it too farbut these are surely just fanciful stories! A spellburrow knows one cantrip of the DM's choice drawn from the sorcerer or warlock spell list, and you can cast this cantrip as if you know it. In addition, a spellburrow knows one 1st-level spell and one 2nd-level spell from the same spell list its cantrip is from. If you have the Spellcasting or Pact Magic class feature, you can cast these spells as if you had prepared or learned them, and they don't count against the number of spells you can prepare or know. You can choose to use either your Intelligence modifier, or a spellcasting ability modifier you have gained from another source, for these spells.

Symbiotic Nature. A spellburrow can't be removed from you while you're attuned to it, and you can't voluntarily end your attunement to it. If you're targeted by a spell that ends a curse, your attunement to the spellburrow ends, and you can remove it.