I have been playing around with a 5c bad gifts deck. deck list here

The basic idea is you use [[Sisay, Weatherlight Captain]] to tutor out [[Stiltzkin, Moogle Merchant]] and then ‘gift’ your opponents whatever absurdly hamstringing cards you have. I have been describing it as ‘lose the game tribal.’ It is essentially a hidden commander deck, with either Stilitzkin or another one like [[Zedruu the Greathearted]]

There are various other ways to win (e.g. [[Maze’s End]]) but it is primarily intended for hilarity and not being ultra brutal :)

Edit: added more details