Dreadful Machinations

House Dimir
Level 4
Casting Time: 1 Action
Duration: 1 Minute (Concentration)
Range: 80 ft
Target creature within range that is capable of casting a spell must make an INT Saving Throw. If they fail, you may gain knowledge of what spells they can cast and may choose 1 (?) of their spells of a level equal to 4 or lower, the effected creature may not cast these spells for this spell's duration.
At higher levels, this spell can target one additional spell and the levels of which they have to choose from are one level higher.