Cure/Cause Cuts

You send a pulse of energy through a creature that either boosts or reverses their healing ability.

Against an unwilling creature, make a melee spell attack. On a hit they take 1d4 necrotic damage and you recive that much health. (never going above your max)

If it's a willing creature, heal 1d4 hit points. There is no attack roll against willing creatures.

This minor energy can only affect a creature once before they finish a long rest.  Works twice at lvl 5, four times at lvl 10 and now works after only a short rest, eight times at lvl 15, and at lvl 20 it works up to half your level plus your wisdom modifier.