This version drops Sliver Overlord because the First Sliver is more fun.

Two card combos to look for: Sedge Sliver and Urborg, Tomb of Yawgmoth; Venom Sliver and Thorncaster Sliver; Spiteful Sliver and Blasphomous Act; Essence Sliver and Syphon Sliver (yes, they stack); Bonesythe Sliver and Virulent Sliver/Synapse Sliver/or Brood Sliver.