The most innocuous cards are often the most powerful and this is no exception
They are super cheap, they are proactive and most importantly they deal with most of the things that disrupt your combo
Echo of Eons pulls double duty: You get two wheels if you cast it naturally, but it pairs nicely with any discard wheels since you can flash it back later
Reverse holo cards in Japan can also feature a particular bubble pattern, whereas Crown Zenith's cards only feature the standard herringbone pattern for reverse holos
Where it gets truly strong, though, is playing those creatures that get arbitrarily large think Malignus, or Taurean Mauler and following up with instant speed Burn spells
I think going to look at my local slab selection at GameStop sounds far more appealing than current retail offerings, and is more in-line with a quality LCS or card show