Shadows of the Past

Lingering Souls | Sorcery | | Create two 1/1 white Spirit creature tokens with flying. Flashback {1}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.) | Bud Cook

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

Unburial Rites | Sorcery | | Return target creature card from your graveyard to the battlefield. Flashback {3}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.) | Ryan Pancoast

Spider Spawning | Sorcery | | Create a 1/2 green Spider creature token with reach for each creature card in your graveyard. Flashback {6}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.) | Daniel Ljunggren