StarCityGames, an event coordinator, marketplace, and coverage center for Magic: The Gathering has an article up detailing their spoiler, Dark Salvation
It's my theory that R&D was sick of seeing it and left it in Urza's Destiny just t get rid of it
While I didn't shove in a full Dwarf Tribal subtheme into this section, I did add a couple strong choices that synergize well in the deck, with the best by far being Magda, Brazen Outlaw: tap to crew vehicles, make treasure, spend that treasure to cast spells or cheat out Parhelion II
Rite of Renewal Two regrowths stapled together with some graveyard hate
In addition, Lena's sacrifice ability differs from Spectacular Spider-Man and Boromir in that it only grants indestructibility to your creatures with power less than its power