With this spell, you attempt to bind a celestial, an elemental, a fey, or a fiend to your service Of CR 4 Or lower. The creature must be within range for the entire casting of the spell. Completion of the casting, the target must make a Charisma saving throw. On a failed save, it is bound to serve you Untill Destroyed. If the creature was summoned or created by another spell, that spell's duration is extended to match the duration of this spell.
A bound creature must follow your instructions to the best of its ability. You might command the creature to accompany you on an adventure, to guard a location, or to deliver a message. If the creature carries out your instructions completely before the spell ends, it travels to you to report this fact if you are on the same plane of existence. If you are on a different plane of existence, it returns to the place where you bound it and remains there until the spell ends.
At Higher Levels. The CR of the Creatures you can Enthrall increase's by 2 for each higher level spell you slot you use to cast it, To a maximum of CR 17.
* - (a jewel worth at least 1,000 gp, which the spell consumes)