For example, you could run Nalia de'Arnise or Burakos, Party Leader in a deck with nothing but Warriors
That being said, your best draws are blisteringly fast and will run your opponents over, especially if they stumble
Entropic Decay allows you to mill four cards before casting Gray SlaadGray Slaad, meaning youre much more likely to have a 4/1 with menace and deathtouch
Cards that reset your opponent's entire board state while leaving your own intact are few and far between, so the power of this card should not be underestimated, even though it doesn't technically destroy anything
Im not a big fan of turning my lands into creatures because a Wrath of God tends to wreck ones day, so Id rely on proliferating this Nissa to get the emblem from her ultimate before actually using the +1 ability
Below are what I believe to be the most popular reasons: Its Fun -- The goal of Magic is to reduce the opponents life from 20 to 0