This takes up such a strange position on this list because Ad Nauseam requires a lot of build-around to work
Im still willing to give them a shot, but they came pretty close to hitting the chopping block
For one thing, life advantage doesnt translate well into other aspects of the game, such as having more cards in hand than your opponent or having better creatures on the battlefield
The idea we went with was based on the living weapon mechanic, where an Equipment enters, creates a creature token, then attaches itself to that token
Theyre excellent in most 2-color decks, but they get tough when you get to more colors
Getting viable attackers on your board is also a great boon if not to be your first choice win condition, then to apply pressure to opposing value engines