Archive Decipherer

Spells you cast from your graveyard cost {1} less
to cast.
Activated abilities of cards in your graveyard cost
{1} less to activate.
Etherialize {4}{u}({4}{u}, Exile this card from your
graveyard: Create a token that's a copy of this card,
except it's a white Spirit with flying in addition to its
other types and abilities.)