Mizium Apparatus

On a successful check, you cast the spell as
normal, using your spell save DC and spell-
casting ability modifier. On a failed check, you
cast a different spell from the one you intended as
randomly determined by the DM.
If you try to cast a cantrip you don't know, the
DC for the Intelligence (Arcana) check is 10, and
on a failed check, there is no effect.