You recite an incantation over an undisturbed poo mor body of aether, place your hand within it, and focus on a creature you have met before. If the target is outside of the Aetherial Expanse, the spell fails. If the target is within the Aetherial Expanse, the creature hears every word you speak aloud for the duration of the spell while you are touching the aether.

Though you can't see the target through this spell, you are magically aware of whether the target can hear you and if it is touching aether. While the spell lasts, you can hear anything the target says if it is touching aether while speaking aloud. 

If you target an unwilling creature, it can make a Charisma saving throw when you cast the spell, causing the spell to fail immediately on a success.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the duration increases by 2 minutes for each spell slot level above 3rd.