He could also be interesting in blinking or 'cast from exile' Commander decks, thanks to his powerful airbending effect
If the true SAR rate is closer to 13%, the specific-card average is even harsher
Mantle is a popular choice in decks where a Commander needs to get through and deal damage to a player, but its not expensive
increasing the combo potential (and Tutor effects, to find the pieces) is definitely solid approach to make the deck more competitive in Bracket 4
Many tribal decks tend to run a number of generically powerful staples
This might seem like something that could only happen in Commander with cards like Platinum Angel, and while Commander is probably the most reasonable home for "you can't lose the game" effects, there are actually not just one but two different ways of pulling off this feat in Standard as well