You mean Tombstone Stairwell, right? I am running Dread Return and probably always will for this deck (the manaless Flashback cost is pretty accessible for such a powerful effect).
Ah, I fudged up this part. I thought the manaless Flashback card was Dredge Return, and I didn't see it when I Ctrl+F'd. I figured you could use the tokens for that, because you'd already have some creatures in your graveyard, but even so Tombstone Stairwell doesn't fit very well.