This lets a creature count as all creature types, which means you can make a sliverless sliver deck and Im here for that
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.) (6/6/2025) In a Two-Headed Giant game, Traveling Chocobo's second ability does not affect triggered abilities of permanents your teammate controls.
That means he can steal your opponents best dead creature, deny them a reanimation target, and become a 4/4 (at minimum) with extra abilities, all for four mana
Practically any effect that creates a token copy of something can be manipulated with this effect, including cards like Flameshadow Conjuring and Delina, Wild Mage
Maybe slap him with Voltron decks alongside commanders like Ardenn, Intrepid Archaeologist
Mostly it is about where Stoneforge is now placed as a pick priority