Evoker's Matrix

You weave the fabric of magic itself, creating an arcane matrix that floats within 5 ft. of you. This Tiny matrix has an AC equal to your spell save DC, 1 hit point, and immunity to psychic damage.

For the duration, you may use a bonus action to cast a cantrip that you know that deals damage to at least one target through this matrix, using your spell save DC or spell attack bonus, as applicable. If the cantrip you cast uses separate attack rolls as part of its casting (for example, multiple beams from an Eldritch Blast spell), then you are only able to use one attack roll for the cantrip. If the cantrip requires a weapon as a material component, then the spell ends.

When the spell ends, the magic rebounds from the matrix, causing you to be unable to cast spells until the end of your next turn.