Cauterize

Tap into the inherent light of your inner flames to cauterize a willing target's wound, or sear an unwilling target's wound if the target has an open wound.

The spell either heals for 1d8 + your spellcasting ability modifier, or damages for 2d8 + your spellcasting ability modifier if it is missing any of its hit points. If the target is unwilling, make a melee spell attack. On a successful cast (heal or damage), any subsequent healing the target receives is halved. This reduction lasts until the target finishes a long rest, or is removed by the effects of a Greater Restoration spell.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the healing/damage increases by 1d8 for each slot level above 1st.