For two-mana, you get to bring back a legendary creature from your graveyard to the battlefield, giving it haste for the turn
In Commander, where a valuable land is just a one-of in a hundred-card library, this can find you that Volrath's Stronghold, Academy Ruins, Strip Mine, or Maze of Ith that you need badly
With both Twinning Staff and Alania on the battlefield, you'll be able to cast three separate instants of the spell
That second activated ability makes a solid outlet for an absurd (or even infinite) amount of mana if you have a way to make that happen
Then the Punishment half is a Golgari X-costed sorcery that sweeps everything with that X cost of the artifact, enchantment and creature variety
Check out our list of the most valuable MTG cards, and our list of the most valuable cards in MTG set, Lorwyn Eclipsed