Cant lose is like having a Platinum Angel on your team, or having cast an Angels Grace at all moments
Additionally, it has both vigilance and menace, and it makes the owner draw a card and then discard a card whenever they attack, but more importantly, it reads "Whenever you draw a card, Zombies you control get +1/+1 until end of turn." This MTG card combos exceptionally well with Graveborn Muse, as it can grant players the ability to draw a lot of cards each turn, then making Zombies get +1/+1 for each of those cards via Temmet
If the past is anything to go by, all of the special-effect lands, especially the lands that can turn into creatures, have a lot of potential as low-cost, medium-impact additions to a deck
If you get 1-14, you create a tapped and attacking token of that Creature, except its not legendary, and you have to exile it at the end of combat., If you get 15-20, you get to do that, but then roll again
With a package of a couple of Pia and Kiran Nalaars
Menace is also always a welcome sight