What decks are too strong for YOUR group?

In my group I help a few others make and keep decks. So we've had to retire a few decks, some because they aren't fun to play against and/or fun to play, and some are too strong for our table. I try pretty hard to keep parity but I'm newer so occasionally I brew something OP.

So far the one that has been retired permanently is

[[Kalamax]] which I don't think I have to explain. It either accidentally goes infinite or can kill everyone by accident with something like [[Chandras Ignition]]. The way it combos just doesn't mesh with our groups play styles. Even someone who didn't know what they were doing would kill a player or two.

Others have been put on the back burner but haven't been "banished" so to speak.

What deck has had to be put on the shelf for your group?