Mnemonic Nexus

Izzet League and House Dimir Spell
Level 4
Casting Time: 1 Action
Duration: 1 Minute (Concentration)
Range: Self (30 ft radius)
All humanoids capable of casting spells that are in range during the duration of this spell must make an Intelligence (?) Saving Throw at the beginning of each of their turns. Each turn that they fail this Saving Throw, they cannot cast any Cantrips until their next turn.
When cast at a higher level, the radius increases by 10 ft