The trick is to figure out your opponents priorities
Estinien Varlineau Estinien Varlineau looks to your dragons to give you some decent card draw #46
There are dozens of ways to draw cards from sacrificing creatures, and most of them are far, far better than paying 6 mana and skipping your draw step
This is cheap for an Eldrazi (does this count for a cheap non-artifact colorless creature?), but maybe I could make it cheaper
Nashi, Searcher in the Dark An evasive 2-drop that gets bigger and fills the graveyard, Nashi, Searcher in the Dark from Duskmourn: House of Horror plays like a powered-down Psychic Frog, which has been more than viable in its home formats of Modern and Legacy
RIX seems to have printed loads and loads of cards exactly at the point at which they have stopped being cube worthy