Having synergistic cards that can pull double duty and provide for multiple builds makes your cube greater than the sum of its parts
You have more choices for lands to fetch, and dual lands with basic land types on them are amazing to have in a deck with fetch lands
However, I can only cast it whenever I could a sorcery, during my main phases
And it couldn't be better timed, because you can order well ahead of Christmas
Lastly, Wretched Ranks, helmed by Ghoulcaller Gisa, not only has a compelling Zombie Aristocrats theme but might also have a moderate amount of value, too
Vannifar is a four-mana green and blue 3/4 that allows you to do this for free at the beginning of combat on your turn, or you can put a +1/+1 counter on each colourless creature you control