There are some awesome character creation additions that Im in love with, including races like centaur, minotaur, and satyr, a new bard and paladin subclass, and supernatural gifts (my favorite)
19 Ria Ivor, Bane Of Bladehold Battle Cry For Phyrexians Suggested Cards: Regal Bunnicorn, Elas il-Kor, Sadistic Pilgrim, Mondrak, Glory Dominus Mite tokens are very easy to flood the battlefield with, and Ria Ivor, Bane Of Bladehold, is one of the ways to accomplish this
Third Path Iconoclast, Saheeli, Sublime Artificer, and Prismari Pianist are just a handful of options to flood the board with tokens for this Izzet commander to lead into battle
Any time you are looking at building an artifact themed deck in blue, Urza, Lord High Artificer, should always be on the consideration pile
The Breed Lethality deck is particularly good since it introduces the Phyrexian Angel Atraxa, with her original card, Atraxa, Praetors Voice