Inatra, The Storm Incarnate

Eminence — As long as Inatra, The Storm Incarnate is in the command zone or on the battlefield, you can't cast permanent spells.

Protection from Permanents

Whenever you cast an spell, you get an experience counter.

Spells you cast cost {x} less to cast, where X is the number of experience counters you have.

All spells you cast have Storm.