It's a shame the base creature costs so much mana, but you can flicker it to build your board and win with the waterbending ability, alongside white's ample token support like Mondrak, Glory Dominus
Perfect Order Rip Til You Hit EX Don't Count
However, Heishin defeats Atem (the player will continue to duel Heishin until he or she loses), and Muran tells Atem to shatter the Puzzle, even attempting to subdue Heishin
series, with traps often persisting beyond activation, or field spells affecting both players functionally - Not to mention star chip rules
This kind of does that
In fact, all of the top cards listed above lost a bit of value since we last checked in with the exception of Durant ex Special Illustration Rare and Archaludon ex Special Illustration Rare, both of which increased in value by just a few cents