The evil, powerful artifact at the centre of the whole saga, being tempted by the Ring enables you to give a creature an ever-growing list of new powers and abilities
Azusa allows you to play an additional two lands every turn
People keep mentioning this as an auto-include for Brudiclad, Telchor Engineer, but I wouldn't run it there because again, the "hot garbage" problem isn't solved
Mishra's Bauble provides a 0-mana cantrip and a bit of information
There are plenty of cards that can bring creatures out from the graveyard to your side of the battlefield such as Virtue of Persistence, The Cruelty of Gix (which can also act as a tutor), Grave Betrayal, and Ashen Powder
While you opening a Tree of Redemption in your $10 pack does mean that someone, somewhere is happily opening a Jace, the Mind Sculptor in their pack, this doesn't really do much to soften the blow of the bad boxes and packs that will be fairly common with Masters 25