Given that fetchlands are super strong, the only real annoying part of them is the shuffling.
To fix that, we simply wish for a land outside of the game or in exile.
Glorified UW Wish-Land
Land T, sacrifice ~ : Choose a Plains or Island card you own from outside the game or in exile and put it onto the battlefield.
In Limited you would basicly get a dual-land from this, as you have any basic in the sideboard.
In constructed you have to sacrifice sideboard cards to make this card viable, and if you want to use many of these, or combinations of duals, you will sacrifice more and more sideboard space.
As this is a much more real drawback than having them in your library anyway, we can remove that pesky 1 life payment.
We do not need to shuffle anymore, just need to put the wished lands back in the sideboard after the game (which shouldnt be a problem, unless you shuffle the lands in your library, and have to search them, probably forget to put them back etc. pretty much whats true for the wishes aswell).
Could even make a version for basic lands only:
Basic Wish-Land
Land T, sacrifice ~ : Choose a basic land card you own from outside the game or in exile and put it onto the battlefield.
Probably a little too much for a common, but a set that messes around with exile much, this could be quite a thing.
----
Save time searching, shuffling, writing life totals (-1), more time playing.
This is great for online play, but I think you dramatically underestimate the amount of logistical issues it would cause IRL. Wishes see relatively niche play in a format where most players are quite experience, they fetch cards which are usually pretty memorable, and they are commonly used to find something which ends the game right then. Additionally, a lot of the time you will wish for something that is not in your maindeck, or that has a very memorable 3-1 split because your deck revolves around it. With these, you could easily get a plains turn 1, and then another turn 8, play three from your hand, and get one more on turn 5 Rampant Growth. Then on turn 15, when the game ends, it is a real hassle to remember exactly what the numbers are, so you basically have to go through your sideboard and verify the contents are correct after each game. Given the time that takes, and the increase in deck checks that might ensue, I don't think these are realistic, platonically clever as they might be.
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I primarily play limited, so most of my spoiler season comments view cards through that lens.
Probable "fix" from the common wishes is to exile them instead of sacrifice.
So they pretty much "replace" the card you wish for, so at the end of the game, you just replace them back.
However, in general we wish for lands, so it does not need to be the "very" same card you put back, if you wish a plain, any plain will do, you dont have to keep track what land was wished and which is from your starting deck, as long as you put a valid sideboard back together after the game.
With the sideboard-rule that you may add more cards to your deck (but not more than 15 sideboard cards, so no removing) ; you wouldnt even have a illegal deck after game 1, even if you forget to put the wished lands back in your sideboard ; but obvisiously you would feel pretty stupid when you attempt to wish for a land that you cant find.
So the overall management of the sideboard cards "currently" is overall trivial as they are pretty clearly defined cards.
Wish-lands would indeed change the sideboard to be more than it currently is ; as it becomes a part of your maindeck aswell in some sence, and a much easier to access one too (as wishes are much more specialized for specific combo decks, "normal" decks dont really use them, and even in the time they where standard legal, Living Wish did had its use to "fetch" land cards from your sideboard aswell and that worked out totally fine).
Using the sideboard in that way might just be a beauty about this lands.
Its absolutely different from what we are currently used to (which is searching, shuffling, etc).
To fix that, we simply wish for a land outside of the game or in exile.
Glorified UW Wish-Land
Land
T, sacrifice ~ : Choose a Plains or Island card you own from outside the game or in exile and put it onto the battlefield.
In Limited you would basicly get a dual-land from this, as you have any basic in the sideboard.
In constructed you have to sacrifice sideboard cards to make this card viable, and if you want to use many of these, or combinations of duals, you will sacrifice more and more sideboard space.
As this is a much more real drawback than having them in your library anyway, we can remove that pesky 1 life payment.
We do not need to shuffle anymore, just need to put the wished lands back in the sideboard after the game (which shouldnt be a problem, unless you shuffle the lands in your library, and have to search them, probably forget to put them back etc. pretty much whats true for the wishes aswell).
Could even make a version for basic lands only:
Basic Wish-Land
Land
T, sacrifice ~ : Choose a basic land card you own from outside the game or in exile and put it onto the battlefield.
Probably a little too much for a common, but a set that messes around with exile much, this could be quite a thing.
----
Save time searching, shuffling, writing life totals (-1), more time playing.
WUBRG#BlackLotusMatterWUBRG
👮👮👮 #BlueLivesMatter 👮👮👮
Interested in Custom Card Creation.
My Cube:Cardinal Custom Cube
A custom version of a third modern masters: MM2019
(filter->rarity to see in set rarity).
So they pretty much "replace" the card you wish for, so at the end of the game, you just replace them back.
However, in general we wish for lands, so it does not need to be the "very" same card you put back, if you wish a plain, any plain will do, you dont have to keep track what land was wished and which is from your starting deck, as long as you put a valid sideboard back together after the game.
With the sideboard-rule that you may add more cards to your deck (but not more than 15 sideboard cards, so no removing) ; you wouldnt even have a illegal deck after game 1, even if you forget to put the wished lands back in your sideboard ; but obvisiously you would feel pretty stupid when you attempt to wish for a land that you cant find.
So the overall management of the sideboard cards "currently" is overall trivial as they are pretty clearly defined cards.
Wish-lands would indeed change the sideboard to be more than it currently is ; as it becomes a part of your maindeck aswell in some sence, and a much easier to access one too (as wishes are much more specialized for specific combo decks, "normal" decks dont really use them, and even in the time they where standard legal, Living Wish did had its use to "fetch" land cards from your sideboard aswell and that worked out totally fine).
Using the sideboard in that way might just be a beauty about this lands.
Its absolutely different from what we are currently used to (which is searching, shuffling, etc).
WUBRG#BlackLotusMatterWUBRG
👮👮👮 #BlueLivesMatter 👮👮👮
I think these need to be exile over sacrifice, but I could maybe get behind them then.
Interested in Custom Card Creation.
My Cube:Cardinal Custom Cube
A custom version of a third modern masters: MM2019
(filter->rarity to see in set rarity).