Arias, Hourglass Master

Whenever you cast your first instant or sorcery
spell from your hand each turn, you may discard
a card. If you do, return that spell to your hand instead of putting it anywhere else as it resolves.
Instant and sorcery spells you cast from your
hand cost {1} less to cast for each spell with the
same name as that spell you've cast from your
hand this turn.