This card looks hilarious and is so out of form from what I usually play, I thought it could be fun to give a go. Problem is, I don't know the first thing about making a decent deck! My thought is throw some hug stuff in there like Howling Mine to sneak in some goodwill,and make Blim, Comedic Genius all voltron'd up with unblockable and double strike for maximum deliverance of my own permanents.
I know there's a real mean but terrible card that sets life totals to 5, that would be fun too I bet. Ideas appreciated and welcomed.
Compared to Zedruu the Greathearted, Blim is a lot more difficult to build, mostly for the fact that he’s a 4/3 flyer. In order to maximize him, I’d go with something like Assault Suit and a swampwalk enabler with Urborg, Tomb of Yawgmoth, just for the pure chaos, and to maximize his ability. Plus he becomes less of a ‘threat’ and more of a ‘weapon’ that way.
For card ideas, there’s not a ton off the top of my head that I can think of, but any Lich type effect works good for an early-ish kill. Demonic Pact is another lose the game you can give somebody. Demonic Lore nukes card draw decks. Demonic Taskmaster works well too, or Akroan Horse if you want more of a group hug theme.
Some curses are controlled by the cursed player, again making Blim slightly more viable. A few other cards that work well that come into play under opponents control are Pendant of Prosperity, Sleeper Agent and Xantcha (basically the same idea, Coveted Jewel which is counterintuitive so opponents don’t attack you, but besides that there isn’t a lot you could use. And, aura enchantments you put on opponents creatures you still control, which really sucks for making Blim a fantastic commander.