Anna's Spell Dominance

You attempt to seize the and control the spell being cast by another creature. You can only use this spell against a spell cast at a level lower than 8th. It must make on a saving throw with its spellcasting ability against your spell save DC. (a creature can willingly fail this saving throw)
On a failure you are treated as the caster of the spell for all purposes except the components and concentration. On a success all creatures affected by the spell automatically succeed on their saving throws against it or the spell's attack roll(s) are made with disadvantage, depending on the nature of the spell.
At Higher Levels: If you cast this spell using a spell slot of 8th level or higher, the spell level that they can cast through you increases by one level for each spell's level above 7th.