This is likely because of its pretty unique effect thats nicely suited to multiplayer formats by making things worse for your opponents while better for you
I know many people do that, but I think its just unreliable in what its supposed to do
Ramp decks didnt perform particularly well at #SCGCIN last weekend, but I also believe that was because people hadnt found the best builds yet and Ramp decks will be a large part of the metagame post-Pro Tour
Liliana, Dreadhorde General I dont think I could do a black removal article without at least one Liliana planeswalker
Exile, bounce, sacrifice, -X/-X, and Auras can all shut down indestructible
Dragon Cost Reducers When it comes to getting your dragons onto the battlefield faster, cards like Nogi, Draco-Zealot, Dragonlord's Servant, and Dragonspeaker Shaman do a ton of work