Tolarian School of Wizardry

At the beginning of your upkeep you may reveal
an instant or sorcery spell from your hand, and if
you do, exile it and put a learning counter on
Tolarian School of Wizardry.
You may cast instant and sorcery spells exiled by
this card as though they had flash, and it cost {x} less to cast for each learning counter on
Tolarian School of Wizardry.