The winner searches their library for two cards, puts those cards into their hand, then shuffles their library
Before it was converted into a hotel and casino by New Vegas' Mr House, the survivors holed up in this vault were forced to settle all their disputes with gambling games
If chaotic, demonic, and tempestuously powerful The Ruinous Powers sounds like your type of deck, there are plenty of ways to make it your own
The cipher ability doesn't target that creature
Echo proved to be unnecessarily confusing, so they moved to a version where you just paid immediately after you exchanged the creatures
I don't know if you like to win games that way, but any competitive Kalamax deck will probably have that basic plan