Induce Paranoia

House Dimir Spell
Level 2 (?)
Casting Time: Reaction
Duration: Instantaneous
Range: 30 ft (?)
Cast as a reaction to another creature casting a spell. Target creature you can see within range must succeed on an INT Saving Throw or lose another spell slot of the level of the spell they just cast. If they have no more of that slot, they lose a spell slot of a level lower than the one they just cast. This spell cannot effect creatures without spell slots.