Dark Obsession

Upon casting this spell, you become totally focused on one creature within sight, gazing into their soul. When you cast this spell, all other creatures become invisible to you, and you are deafened to what they say or do. For the duration of the spell, you have advantage on attack rolls against the targeted creature, and your concentration of this spell cannot be broken by that creature. Due to the spiritual nature of this spell, you always know where they are and form a constant image of them in your mind. For example, if they become invisible, or move behind cover, or enter the area of the spell Darkness, you will continue to see their silhouette. When your target becomes unconscious or dies, you can swap your focus to another creature within sight for the remaining duration of the spell.

This spell ends when concentration is broken, if you become unconscious, or if you decide to end it when your target becomes unconscious or dies. You can also establish a single word or phrase that you will hear while the spell is active, which will end it when heard, however you cannot say it.