They can't be the target of spells or abilities, their static abilities have no effect on the game, their triggered abilities can't trigger, they can't attack or block, and so on
He has been an avid consumer of board game media content (podcasts, blogs, vlogs, etc.) for the last 7 years and has finally come on to the scene to produce some original content through Inside Up Games in the form of a blog
Now, since Commander has become the de facto way to play multiplayer Magic, Archenemy has received some updates to EDH-become compatible
Toss in exciting new sagas from Final Fantasy like Summon: Odin and Summon: Bahamut, and you have an excellent deck on your hands
Take one of my Commander decks: It has Command Tower, Tropical Island, Breeding Pool, and Misty Rainforest all in it