Beam of corrupting energy

The beam is of pure blackness and with a purple aura. This spell take half the hit points of the targeted creature. The targeted creature must make a dexterity saving throw equal to the caster save DC. If the spell hits then the creature must make a constitution saving throw of the casters save DC on a failed save then the hit creature is corrupted and it takes a full extra turn immediately after their first turn for 24 hours. The creature also has and uses the rage effect and it gains the effect no matter what. If the creature already is ragging then the effect stacks and gains the effect of rage on top of the existing one.