Bonds of Life

As part of casting this spell, you must expend 3 hit dice or the spell automatically fails. If you do, roll the expended hit dice, and the creature gains an equal number of temporary hit points.
For the duration of the spell, you know the direction a and distance to the creature at all times, you and the creature can speak telepathically (provided the creature has an intelligence score of 3 or higher), and you can target the creature with spells you can cast with the range of Self or Touch. These benefits are suppressed while you and the creature are not on the same plane.
At any point, a creature affected by this spell can choose to end it early. If it does, the creature loses all remaining temporary hit points granted by this spell, and takes necrotic damage equal to the temporary hit points lost.

At Higher Levels. When you cast this spell using a spell slot of 5th or 6th level, its duration is 8 hours. When you cast this spell using a spell slot of 7th or 8th level, its duration is 24 hours. When you cast this spell using a 9th level spell slot, its duration is 7 days.