You attempt to warp, re-stitch and repair the flesh of a creature you can see within range. The creature regains 1d12 hit points and you must make a check using you spellcasting ability modifier, against a DC of 10. If you fail, the target takes 1d6 necrotic damage at the start of their next turn. This damage cannot be reduced in any way. 

At Higher Levels: If you cast this spell using a spell slot of 2nd level or higher, the target regains an additional 1d12 hit points and the DC of the ability check increases by 1, for each level slot above 1st.