Coin flip cards are frequently controversial and not everyone agrees on their relative merits, but most of whats going on with Ral Zarek has nothing to do with coin flips and even the coin flip ability involves flipping five coins which actually smooths out the variance
Unless youre willing to spend a prohibitive amount of mana to summon a creature with Bribery, youll only be able to search for instants or sorceries
Tataru Taru is also kind of interesting as a good ol' hatebear, like Lotho, because if there's anything EDH players like doing, it's drawing a bunch of cards
The gameplan of using Fetchlands, Shocklands, and Street Wraith to lower your own life total and make Deaths Shadow a deadly threat used to be very strong
Tidus brings his Cheer ability from Final Fantasy 10 straight into Magic: The Gathering , encouraging and strengthening the rest of his team
The range of creatures they care about casts such a wide net that you have a ton of options for building around this commander