Hall of Storm Giants is arguably the best manland in the game
You get a 6/6 body, flying, uncounterable, firebreathing and protection from two colors
Thats not to mention the prospect of having access to Illuminor in the Command Zone
In a Dragon deck this will sweep all non-Dragons at the table, and thus save your team from sweepage, barring weird non-Dragon support stuff
The remainder of the list looks to generate extra wraiths the Nazgl can pump up, and theres plenty of card draw and protection to keep the wheels turning and your legion of monstrosities expanding
You start playing a game of War or High Card with a +1 modifier and eventually you have traded for all their B-'s with your C's, and now your B-'s are fighting their backup squad and still upgrade