The madness also helps buffer against the symmetrical discard
There are occasions these make for great board cards but overall they are not the kinds of thing your deck is trying to do
The last ability of Clive's Hideaway will allow you to cast both exiled cards without paying their mana costs (assuming you control four or more legendary creatures at that time.) In a Two-Headed Giant game, Traveling Chocobo's second ability does not affect triggered abilities of permanents your teammate controls
You can tell its still around, though, because modern reprints still print World Enchantment in the type line, like Arboria in Dominaria Remastered and Concordant Crossroads in Double Masters 2022
Midnight Hunt's Artifacts & Lands Among the artifacts of Innistrad: Midnight Hunt , The Celestus is the most valuable, a unique legendary artifact that can change day into night or night into day at sorcery speed, which can massively benefit certain draft decks, especially Werewolf tribal builds
Lets not waste any more time and get into it