Commander, previously (and still in some circles) known as Elder Dragon Highlander, is a popular MTG format in which players use carefully-designed, 100-card singleton decks, headed up by a powerful Commander
The mana fixing potential is just that good, even if it affects your opponent as well
Two-colour snow lands, whether recent ones like Alpine Meadow, or older cards such as Arctic Flats, are well worth playing in snow decks, but are otherwise generally unimpressive, for the simple reason that they always enter the battlefield tapped, and provide no benefit besides being snow lands
From building your battlefield to planning your path to win , every moment feels meaningful
The longer answer looks like this
Theres also a fair amount of reanimation in black-white, given that both individual colors excel at recursion on their own