Arch-dragon: All about MTG Nicol Bolas Not only does this provide access to go-wide strategies, it's also really powerful alongside a bunch of tribal dragon cards, which were designed with the expectation that dragons are generally expensive
You'll be discarding and drawing cards almost every turn with Sauron, so include creatures like Chasm Skuler, which grows when you draw cards, and Archfiend of Ifnir, which will punish your opponents when you discard
Ensnaring Bridge sees some Modern play, but is not running the format
It also has some benefit for Goblin tribal decks, and having a color land with ability that can enter the battlefield early in the game untapped is a really nice bonus, too
Mary O'Kill Can I activate the ability if Mary O'Kill is in my hand