The Grimoire is operated by DiceBard.com, Dice Bard has everything you need to play 5e... as long as all you need to play 5e is dice.

Life Transference 3rd-level necromancy

Casting Time: 1 action

Range: 30 feet

Components: V, S

Duration: Instantaneous

Tags: cleric wizard level3 necromancy

You sacrifice some of your health to mend another creature’s injuries. You take 4d8 necrotic damage, and one creature of your choice that you can see within range regains a number of hit points equal to twice the necrotic damage you take.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.

You can find more information on this spell in: XGTE.160