Essence Exchange

The caster selects a creature within 20 feet of itself, and heals 1d6, while the target takes 1d6 radiant damage. The caster may also choose to heal a teammate for 1d6 instead of themself. At higher levels, the damage increases by 1d6 every level, while the healing only increases by 1d6 every 2 levels. If the spell is casted on a undead or unholy creature, the damage changes into 1d8 radiant damage, which also scales with level.