4th-level necromancy
Casting Time: 1 bonus action
Range: 60 feet
Components: V, S
Duration: 1 Turn
You mark a creature within range for your companion to steal its life for you and itself.
The first time your companion hits the marked creature this turn, the creature takes an extra 3d10 necrotic damage and both you and your companion regain an amount of hit points equal to the necrotic damage dealt.
At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d10 for each slot level above 4th.