The reason to play Phyrexian Metamorph is Tinker, where if they get Sphinx of the Steel Wind or Blightsteel Colossus we often lose to it on the spot, but Phyrexian Metamorph gives us an answer we can tutor for with Inventors Fair that is not that embarrasing when we naturally draw it
The One Ring Almost Repeats MTG's Past Mistakes The One Ring promises to be hugely powerful in multiple MTG formats, but with any luck, it will fall short of the extreme power levels of similar artifacts, like Skullclamp and Smuggler's Copter
In limited, you have enough Lander tokens floating around to repeatedly double somethings' power, but in constructed and Commander, this slots nicely into the endless parade of fetchlands, extra lands, and land recursion that already make land decks an absolute beast to play against
Yoshimaru gets permanently bigger and can really win quickly over time