Transfusion

Transfers all of your remaining power to a target within range, completely restoring them while incapacitating yourself. Targets creature within range regains all HP and spell slots, at the cost of dropping you to 0 hp. You are also afflicted with 'Brush With Death' for 100 rounds (600 seconds), which cannot be removed in any way. This spell cannot be cast while under the effects of 'Brush With Death'.