It can make something an artifact permanently, and it plays into any deck's framework where you want to en-artifact your stuff to enhance them with cards like Darksteel Forge or Padeem, Consul of Innovation
For the third ability, can I add another CRANK
And while you do have to sit through the slow start on There and Back Again to see Smaug soar, the fireworks when he does are more than worth the wait
Saboteur abilities trigger twice, so cards that grant this bonus are even more effective
The difference in staples between EDH and cEDH is notable, with cards like Burnt Offering (actually a Rakdos card) featuring quite highly
They're very capable, build great decks, and I certainly wouldn't bet against either of them