@ Mario Background:
My experience in Mario is almost entirely restricted to the 2d platformers: I played the heck out of Super Mario Bros and Super Mario Bros 3 as a kid (less of 2, but I had it. I doubt we want to consider Doki Doki Mario Bros though), and much more recently NSMB Wii and U with a little toe dipped into Mario Maker. I didn't ever have a SNES and I never played the 3d Mario games like 64 or Galaxy. Heck, my knowledge of Odyssey is limited to having watched a speedrun once. So, that's the perspective I'm coming from.
@Mechanical Warping.
I think we need to go big with this. I think we need a Warp Zone.
My pitch: The Warp Zone is a Zone that functions like the battlefield (permanents and tokens can exist there) but isn't subject to any effect that doesn't explicitly effect the Warp Zone. Essentially, objects in the Warp Zone are similar to objects indefinitely phased-out. Various cards would interact with Warp Zone by creating assets there, or moving or exchanging objects in the Warp Zone and Battlefield.
Warp Pipe
Land - Pipe
When Warp Pipe enters the battlefield, if it isn't a token, create a token that's a copy of it in the Warp Zone
: Add
Going Down
Instant
Put target creature you control into the Warp Zone
While the Warp Zone can be stocked various ways, the main means of doing so is through the
Warp X mechanic. To Warp X, reveal the top X cards of your library. Put all permanent cards revealed this way into the Warp Zone and exile the rest.
Star Ride
Instant
Target creature gains Indestructible until end of turn.
Warp 1
Pipe Maze
Enchantment
At the beginning of your upkeep, Warp 1
: Warp 1, then choose a creature in your Warp Zone. Put it onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.
Mario Party
Sorcery
Warp X
While there are exceptions, the primary means of accessing the resources built up in Warp Zone is through a variety of cards that perform exchanges. These are all colorless artifacts, to allow all decks to play with the Warp Zone.
Warp Star
Artifact
,
, Sacrifice Warp Star: Choose a permanent you control and exchange it with a permanent you own in the Warp Zone that shares a type with it.
Warp Whistle
Artifact
,
, Sacrifice Warp Whistle: Choose a permanent type. Exchange all permanents you control of the chosen type with all permanents you own of the chosen type in the Warp Zone
World Warper
Artifact
,
, Sacrifice World Warper: Exchange your Warp Zone and Battlefield.
Other cards may selectively retrieve objects from the Warp Zone, though most cards that do will also Warp, both to ensure you have something there and to make sure a player doesn't just use the Warp Zone as an easily controlled free-cast. Going to the Warp Zone should leave you in a better place, and it does bypass some game play, but there should always be something left after.
~~~
As an aside, given "Worlds" in Mario and their often consistent themes, do we want to bring back World Enchantments to represent what World the game is currently on?