There is no rule anymore preventing you from adding mana outside your commander's color identity. You can run Coveted Jewel in any deck and tap it for any color. This changed a long time ago. You may also run Puzzlebox in any deck, even colorless.
You absolutely can play Gauntlet of Power in any commander deck, and choose any color, no matter the color identity of your commander. You can't choose colorless, but that's because colorless is not a color, not because of any special Commander rules.
The color identity of your commander limits what the color identity of the cards in your decklist are. This counts mana symbols and color indicators anywhere on the card, but does not count color words, "choose a color" or "any color."
Let's say your opponent is going to win the game unless you remove their permanent. They'll choose to let you search their library, and win anyways, every single time.
Let's say you really need to extraction your opponent, like they're playing a combo deck that relies on a specific card. They'll choose to let you exile the permanent, and keep the whole combo in their deck anyways, every single time.
This card will never do what you want. It will always do the thing that makes the least impact on the game. Besides, you are greatly overvaluing the extraction effect. If I'm not playing a combo deck that requires specific one-ofs I'll let you search my deck every time you cast this spell, with zero impact on board state and a -1 in card disadvantage for you.
Milling yourself is a benefit, not a drawback. "Cumulative upkeep: Mill a card" is how this ability should be worded. The rules technology already exists, no reason to reinvent the wheel.
It's just more coherent written this way, rather than stating a post-ex-facto (after the fact of)...
The phrase is "ex post facto."
The rest of your post, as usual, is meaningless under Magic design philosophies. Your card is written wrong, therefore it is not more coherent than a card written correctly, by definition.
I think if you changed it to this is could be workable.
Discard 7 cards: Search your library for Gift of the Champion, reveal it, then shuffle and put it on top. Activate only at the beginning of your upkeep.
Dredge can't use it on turn one and the 7 card restriction prevents potential abuse.
This whole ability doesn't work. The card doesn't have the ability while it's in the library. You can't activate the ability of this card in the library (a hidden zone) any more than you can activate any other card while it's in the library.
You do not need "You may cast it for its mana cost." This functionality already exists with "You may cast it." Adding the "mana cost" part sounds like it would be helpful to tell how the card works but would only cause confusion because it's written differently from other cards that do the same thing.
This is confusing for the reason that choosing the first two modes won't give you double token creature copies. Copies of creature spells don't create tokens, they BECOME tokens.
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It's not that it offends me, it's that it says something about you that you would even think of that.
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You absolutely can play Gauntlet of Power in any commander deck, and choose any color, no matter the color identity of your commander. You can't choose colorless, but that's because colorless is not a color, not because of any special Commander rules.
The color identity of your commander limits what the color identity of the cards in your decklist are. This counts mana symbols and color indicators anywhere on the card, but does not count color words, "choose a color" or "any color."
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Let's say you really need to extraction your opponent, like they're playing a combo deck that relies on a specific card. They'll choose to let you exile the permanent, and keep the whole combo in their deck anyways, every single time.
This card will never do what you want. It will always do the thing that makes the least impact on the game. Besides, you are greatly overvaluing the extraction effect. If I'm not playing a combo deck that requires specific one-ofs I'll let you search my deck every time you cast this spell, with zero impact on board state and a -1 in card disadvantage for you.
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I think he likes arguing.
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The phrase is "ex post facto."
The rest of your post, as usual, is meaningless under Magic design philosophies. Your card is written wrong, therefore it is not more coherent than a card written correctly, by definition.
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This whole ability doesn't work. The card doesn't have the ability while it's in the library. You can't activate the ability of this card in the library (a hidden zone) any more than you can activate any other card while it's in the library.
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