Once you have a few clones on board, you can start casting instants and sorceries with reckless abandon
As I mentioned earlier, a lot of people collect for both the nostalgia, and the financial side of things
This effect replaces your would-be card draw and returns that fetch land or cycled Indatha Triome to your hand, and as a drawback you mill two cards
While I could get behind a similar card designed to hate on the plethora of powerful one-drops in the format, the Phyrexian mana cost of Mental Misstep puts it over the top and allows it to warp the format
Beyond aesthetics, this card appears very powerful, with flying and firebending abilities, as well as card draw any time you use waterbending, earthbending, firebending, or airbending
From there, if you find an engine, things get out of control more or less immediately