This is practically an auto-include in every Golgari deck since they so often care about the number of cards in their graveyard
Stance System: For all intents and purposes, the relationship between the three "Ra" monster cards (The Winged Dragon, Sphere Mode, and Immortal Phoenix) invokes this in a Deck built around them, with each of them having ways of interacting with the others and essentially allowing a player to transition between the forms as needed depending on the situation
Cheating creatures into play is always fun, but this card shines because of what you choose to put onto the battlefield
Mogg War Marshall is also unique in that it is the only cheap token generator that gives you the tokens there and then, for no extra mana, that is a dork
Command Tower and Exotic Orchard are nearly mandatory when you dont have access to green, while Reliquary Tower helps to prevent unwanted discarding
+1: Until your next turn, up to one target creature gets -3/-0