The premise of the deck is to quickly get out cheap walls, build a huge defensive battlefront, and then use your commander (or one of several enchantments) to make the walls able to attack with damage equal to their toughness
Some are no longer available on the market because no one is willing to part with them
Hogaak, Arisen Necropolis and Uro, Titan of Nature's Wrath are prime examples of cards that enabled such powerful graveyard strategies it took the ban hammer to keep them buried
We can play Crystalline Giant and move all kinds of counters around, thus opening the possibility of putting that counter on Crystalline Giant again
Growing and improving as a player, both technically and in her mental game, are of the utmost importance to her.
Gravecrawler: Fits Zombie recursion and sacrifice plans