I love playing Courser of Kruphix or Oracle of Mul Daya, I don't know there's something about playing with the top card faced up that feels me with joy... I'm weird I know, so I began working on mechanics that woudl benefit from knowing or revealed the top card on your deck, so I thought of "Materialize"
Materialize (You may cast this card from your library as long as it’s the top card on it.)
and I'm kind of making it a mechanic
my question here is. Do you think playing cards from the top of your library as long as you have previously seen it or revealed fits that color combination? does it sounds fun, fair?
All three of those colors do have cards that permanently reveal the top card, so I think it works in that combination. As for the mechanic, it seems pretty odd and clunky unless the mechanic itself reveals the top card. In that case it ends up being similar to several other mechanics, including impulse draw (not actually keyworded) and explore. You'd need to find some way to differentiate it. I used a similar mechanic in a graveyard themed deck as the red archetype, although I called it envision, as follows:
Envision (reveal the top card of your library. You may play it this turn. If you don't, put that card into your graveyard at the beginning of the next end step.)
The rules text could be adjusted slightly, but that's the gist of it. You can also assign a number to it to dig deeper if you like, but it starts to get pretty busted even at 2.
Yeah, I made it that way for "balance" reasons, like I think having an extra playable card outside of your hand is already busted enough, so I kinda thought it would be fair for it to rely on foreign spells and mechanics to work (Scry, Survey, Impulse) anything that lets you know what your top card is, sort of like fixing yourself a "miracle card". You're right though, my concern is how clunky it might get and that maybe I'm mistaking interesting for fun
Materialize (If an effect causes you to look at this card from your library, you may reveal it. You may cast this card from your library as long as it’s the top card on it.)
That wording still has some issues, but I see what you're getting at. For example, any tutor would have you look at that card from your library, in which case you could reveal it (although there is no reason why you should). Then you just have to get it on the top of your library and somehow reveal it again (either secretly if a card lets you look at the top of your library, or globally if another card allows that) before you can cast it.
jverse , thanks for your feedback. Yeah, I may be digging myself deeper. but in terms of tutoring, it would be useless to reveal the card if it's going straight to your hand, but what about those that make you reveal the card and then put it on top of the library? hypotetically speaking, if say, you use a "sylvan tutor" to look for a creature with materialize, you'd have to reveal it and it would end up going where you want it to. I guess what I wanted to achive by giving the player the option to reveal a card that had been looked at, was to make said card public, as I think that'd be the biggest issue with the mechanic, it ends up becoming so dependant on its enablers.
Making your "card information" public seems to me like a drawback, which feels fair for having an available card outside your hand. That's what I love about the cards I'm basing this mechanic off of.
other way I could fix it is by having it work sorta like Manifest, but instead of placing the top card on the battlefield, you would just reveal the top card and you could play it as long as it's there.
That last idea is actually not bad. Something like:
Materialize (Reveal the top card of your library. You may play cards revealed this way.)
You don't even really need an "until end of turn" clause because the card won't stay on top of your library for long. I could see that working, and like you say, the card advantage is offset by the information reveal.