This magical tattoo contains the essence of a level 1-3 spell chosen by the tattoo's creator. While the tattoo is on your body, you always have the associated spell prepared, and you can cast the spell using any spell slots you have of the appropriate level. If you have the Spellcasting or Pact Magic feature, the spell uses your spellcasting ability; otherwise, if the spell requires a saving throw or an attack roll, the spell save DC is 13 and the attack bonus is +5. If your Attunement to the tattoo ends, the tattoo vanishes.
You can also cast the spell once without a spell slot and spell components. Once the spell is cast in this way, the tattoo vanishes.