Oosva, Umbrar Mystic

Protection from sorceries.
Instants you cast have Echo of Memory. ( When you cast an instant, you may also cast an instant from your graveyard without paying its mana cost. The instant cast from your graveyard resolves first, and if it would be put into a graveyard this turn, exile it instead.)
{2}{u}{b}: Search your library for an instant and put it into your graveyard. Shuffle your library.