wazaa

You touch a creature and drain its magical energy, restoring your own. The target must make a Constitution saving throw. On a failed save, the target loses 3d8 points of its spellcasting ability (represented by spell slots or similar magical resources), and you regain spell slots equal to half the amount drained. On a successful save, the target loses half as much magical energy, and you regain no spell slots. This spell has no effect on creatures that do not use magic, such as non-spellcasting creatures or constructs.