Each creature you cast creates a number of 1/1 black Thrull tokens equal to the creature's mana value, and when you get seven or more, you have to sacrifice Endrek Sahr
Second, the one they did put in the deck (Nath of the Gilt-Leaf) isn't even all that popular, coming in as the 108th most played in Commander
Each player must draw one card from the deck into their hand at the start of their turn
So once you have a collection, its not hard to turn that collection into a specific group of cards you wantfor play, for speculation, for collecting, or for chewing on (in my sons case)
To me, all of those things were apparent pretty quickly
Gerrard's Verdict It never changes, since he pretty much hates everything