Decor Duels

Introduced with patch 12.0.5, Decor Duels brought the idea of "prop hunt" gameplay to World of Warcraft -- the game, ostensibly an old training exercise revived by the newly-united elves, had players split into teams of hiders and seekers; the hiders would assume the form of ordinary inanimate objects, while the seekers would have to find the disguised players.

With all this Player Housing stuff finally coming to WoW, adding a Prop Hunt mode where the player can become the decor is an obvious next step.