Insidious Fungus Simic Greenshell was already a strong deck and then Duskmourn provided it an on plan one drop
Draft and Sealed For both formats, the standard number of lands to play in a 40-card deck is typically 17
With Masters sets we even have the opportunity to draft a pool of cards from Magics history that wouldnt otherwise interact
(Damage causes loss of life.) If a card would be put into your graveyard from anywhere, exile it instead
That makes it absurdly simple to protect your favorite creature and while thats generally going to be your Commander its nice to have that flexibility.
The first is a triggered ability: "When this permanent enters, target player may search their library for a card named Mothers Yamazaki, reveal it, put it into their hand, then shuffle." The second and third abilities represented by Mothers Yamazaki's "partner with itself" keyword modify the rules for deck construction in the Commander variant and have no function outside of that variant