A 3/3 demon for five mana, Ob Nixilis has a potent landfall trigger, causing target opponent to lose three life and for three +1/+1 counters to be put on Ob Nixilis whenever a land enters the battlefield under its owner's control
It's easy to identify these doppelgngers, though - just look at the cards in the decklists
It basically shrinks all other creatures and sets up an epic one-on-one with an opponents creature
A lot of the new cards in this deck bring plenty of support for the monarch theme: Denethor, Stone Seer, Archivist of Gondor, omer, King of Rohan, Champions of Minas Tirith, Forth Eorlingas!, Crown of Gondor, Fealty to the Realm, and Oath of Eorl all bring some much needed support for the archetype, and in varied and interesting ways
Speaking strictly in regards to its place in Humans, I discussed the ability to tutor up a Noble Hierarch or Champion of the Parish as being solid, and arguably a little bit better than at first glance
After turning your creature into a Shaman, you get to put a creature into play from your hand when the Shaman attacks