Greater Restoration

Casting Time: 1 action
Range: Touch
Components: V, S, M (diamond dust worth at
least 100 gp, which the spell consumes)
Duration: Instantaneous
You imbue a creature you touch with positive
energy to undo a debilitating effect. You can
reduce the target’s exhaustion level by one, or
end effects like charm, petrification, curses,
reduction to ability scores or HP maximum.
See PHB, pg. 246.