Temporal Energy Transference

You reach through time shifting the arcane stamina of your targets from one point in time over the last 24 hours to the present. This process revitalizes the targets spell casting and health but at the cost of their, and your own, physical well being. You may select up to eight willing creatures within range . Upon completion of the casting time those targets hit points are reset to max, their spell slots are returned, their class features are returned, and their racial features are returned. Any creature who is a target of this spell maintains any levels of exhaustion they already had. Any creature who is the target of this spell receives a point of exhaustion. Any creature who is the target of this spell has their Hit point Maximum reduced by 20 hit points until they take a long rest. 

Once this spell is used a caster may not use this spell again for 2d4 days. Until the caster takes a long rest they make all death saving throws at Disadvantage and ignore any abilities, features, or spells that would grant advantage to death saving throws.