You'll often be able to cast Hour and then immediately start rebuilding your board, while it's doubtful that you can convince any smart person to assist you with more mana than you actually need to cast Play of the Game, so chances are that board clear is all you're doing on your turn
While many designers complained that they hated it pumping opponents creatures, which was an intended drawback, in my experience it never came up to devastating
Recurring Nightmare If you actually read how Recurring Nightmare works, it's easy to see why it was banned in Commander
Innistrad: Crimson Vow Tokens Price Guide Market prices in USD for Innistrad: Crimson Vow Tokens cards (Magic: The Gathering), tracked on TCG Stacked and updated regularly
You still can of course, but planeswalkers, Stax, and decks with win conditions that thrive simply by biding their time (Darksteel Reactor and Azors Elocutors anyone?) are also very viable options here