Shadows of the Past

Mystic Retrieval | Sorcery | | Return target instant or sorcery card from your graveyard to your hand. Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.) | Scott Chou

Barter in Blood | Sorcery | | Each player sacrifices two creatures. | Eric Deschamps

Sever the Bloodline | Sorcery | | Exile target creature and all other creatures with the same name as that creature. Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.) | Clint Cearley