Landfall MTG Mechanic If a land enters the battlefield under your control, all your landfall abilities will trigger
On top of the 10/10 flying body that Ureni comes with, you also have a commander with protection from both white and black, the two colors with the most single-target removal in the game
Feldon of the Third Path, 1 graveyard recursion
You can only use this effect of "Protector with Eyes of Blue" once per turn
Now, I am not in those meetings at Wotc, and one could certainly accuse me of extrapolating a bit and making a few assumptions on what WotCs actual agenda is, but at least the idea Im presenting is consistent with the facts
Between Palantir of Orthanc, Call of the Ring and Lord Skitters Blessing, Ill finally stop seeing Phyrexian Arena across the table