Not only does it have the strongest 3 words in magic, draw a card , it is also important that it can be triggered from anywhere, not just from the battlefield
10+ Draw a card 20+ Untap all your creatures 40+ Each opponent loses half their life, rounded up Shes also a 5/7 so youre pretty much already there at the first tier
As with most such cards, despite being great fun and different it is hard to include and draft them in cube due to needing the synergy support cards
EDH is subjective, its modular, its customizable, and most importantly, its a format to play the cards you have
Mise requires a highly swingy card that becomes uber-powerful at times
Make sure to keep your eyes peeled for more precon content from my fellow Scrap Trawlers right here on EDHREC