Quote from DarklingScribe2 »Tasha’s Hideous Laughter is interesting. It is certainly strong when you consider that against some decks with really low curves or a very high land count you might end up exiling 1/3rd of your opponent’s deck, but I’m not sure what constructed mill decks would want this. Standard rogues doesn’t really want to use this because their cards care about the opponent’s graveyard being full and a big part of what makes Modern Mill decks tick is the card advantage from visions of beyond and disruption in the form of sugical extraction and drown in the loch.
At first glance you’d think this would at least gives Modern Mill a mill spell that doesn’t care about sideboard shuffle-in eldrazi, but even then sidboarding in Emrakul, the aeons torn is still not bad vs Tasha’s Hideous Laughter since Emrakul adds a 15 mana value hit, possibly making this into a 3 mana tome scour that exiles rather than a card that can “mill” more cards than archive trap.
What about a control deck that aims to mill instead of use something like a typical control finisher? That would be something I'd be down to try. Mill typically wants to empty libraries as fast as possible, but honestly just slowly grinding out an opponent might be just as good. Plus, it's a cheaper spell to cast meaning you can hold up counters earlier in the game to protect it.