It is engineered to optimize speed and performance for a seamless gaming experience
(This includes disguise, cloak, and in games involving older cards, morph and manifest, as well as a few other effects that turn cards face down.) Common methods for doing this include using markers or dice, or simply placing them in order on the battlefield
Its especially good if you have Glittering Frost enchanting something like a bounce land so you can generate around 6 mana in one turn
It works great with myriad to gain more life or just to attack more players for the win
I think a lot of people are sleeping on this one, not taking into consideration how low the opportunity cost is on it compared to most big card drawers
They never had a really coherent theme, but Captain N'ghathrod brings them together as mill machines, resurrecting what is then put into the graveyard