Rebuilding more and more of my older decks, currently sitting at my old U/G Madness Threshold deck, which used to be a lot of fun. Would love to hear some modern ideas about it, since I'm still not very fond yet of all the stuff post Onslaught cycle.
This is one of the decks we played a lot when our playgroup was just starting out on magic. How about adding one Quiet Speculation, so you could fetch Roar of the Wurm? One of the things I did so many years ago is .. Quiet spec... fetch 2 Roar of the Wurm and 1 Moment's Peace or 2 Roar of the Wurm +1 Ray of Revelation if I'm playing against a deck with enchantments.
I do recommend upping the Quiet Speculation to at least 2 copies. To increase the chances of seeing one each game. Just casting one puts 4 cards into the yard if you're into the thresh strategy. We used to call these decks "Quiet Roar". My deck back then also had one Genesis for recurring werebears that died. Elephant Guide is card disadvantage.. never used them in my UG decks years ago. if your opponent has a lot of removal. Well, but if you're just playing for fun casually.. I guess it's fine.
As for Threshold, Quiet Speculation is indeed way better then I expected - I usually had Threshold by turns 2-3 when having it in my starting hand!
To spice things up, I also thought about splashing White into the Threshold mix (both the current decks feel a tad to similar, despite essentially playing way different) and to finally play that Mystic Enforcer, that I love so much. This way I would also ditch the Control parts of the deck - already have way too many controlly decks.
Here's a first draft: