Teferi, Time Raveler Teferi, Time Raveler might be the most obnoxious planeswalker ever printed, which is an impressive achievement since it goes up against whoppers like Oko, Thief of Crowns and Narset, Parter of Veils
They can supplement other strategies
On that blog you linked is another post about unlimited cards showing a couple others cards: choco7maron.blog.fc2.com/blog-entry-148.html I think this post explains how they were for teaching kids how to use the e-reader cards at pokemon centers/tournaments and after teaching the kid theyd be given the card
The set features payoffs for several creature types that really didnt catch on in the long run Thrull is one of them
But most multiplayer Commander decks leave at least a few creatures untapped to fend off attacks, which provides an opportunity for Calamity of Cinders
Best of luck with the remainder of the cards