
Originally Posted by
th3 w1z4rd
But more often it's not. Only against the greediest manabases is it ever even possibly an auto win. Here's a list of decks against which Magus has no or almost no effect whatsoever:
Elves, Death and Taxes, Merfolk, Goblins, all Show and Tell variants, Storm a lot of the time, Belcher, MUD mirrors, Mono anything, Miracles...
Even against RUG, the deck with the greediest manabase, they have so much red burn that they'll just kill him and move on. Even BUG can float mana in response and Decay him. Esper can float a white and Swords him or whatever. Maverick has basics and removal and Knight of the Reliquary can fetch them even if you land Magus and they have none. Or they could GSZ for Knight. Anything with basics and removal doesn't really care. Many people don't fetch till it's necessary anyway. And he can still be countered unless you have a Cavern, although that's not an argument against running him.
Basically, I feel the colorless version of MUD is more consistent and stronger because it's still possible to have red cards and no red mana source, and I feel loading up on better cards like Wurmcoil Engine and Steel Hellkite is better than using Magus and Welder because the latter two are situationally good only.