How can I efficiently filter MagicCards.info searches down to cards castable with only certain mana colours?

Question

I've been constructing a green/white commander deck, and doing a lot of searches on MagicCards.info for its cards. To cut out all the cards I can't use, I've been using the search term c!gw to get just green and white cards. But I just realised that's a terrible way to search — it filters out all the off-colour hybrid mana cards!

For example, a search of c!gw o:"enchant land" o:"mana pool" yields a lot of green/white land ramping enchantments. But it excludes Trace of Abundance, which costs {R/W}{G}, making it red and excluded from the search, despite being perfectly castable with just green and white mana and exactly the kind of card I want.

Using a more inclusive filter of c:gw would also include lots of three-colour cards which I cannot cast.

How can I filter a MagicCards.info search down to only those cards I can cast with particular mana colours? If my mana pool is exclusively green and white, is there a filter that will include cards I can cast with those colours, even if they're off-colour cards like Figure of Destiny and Trace of Abundance?

(Colourless cards can be included or left out. They are simple enough to search for separately with c:c, or exclude from the search with -c:c.)

(Also, it's been pointed out to me my group's been accidentally playing without the color identity rule. Doesn't matter! Still good. Question ahoy!)

Answer 1

What you are asking for is effectively equivalent to "the mana cost does not contain {U}, {B}, {R}, {U/B}, {U/R}, or {B/R}" because those are all of the mana symbols that cannot be paid from your mana pool. This can be equivalently expressed by negating the expression that says "the mana cost contains any one of those symbols". So, the resulting query is

-(mana>=u or mana>=b or mana>=r or mana>={U/B} or mana>={U/R} or mana>={B/R}) o:"enchant land" o:"mana pool"

Note the - at the beginning that negates the bolded expression. As you can see, this does in fact list every card your search found, plus Trace of Abundance. It also incidentally includes colorless cards and cards with Phyrexian and colorless hybrid mana symbols (e.g. {UP} or {2/R}) because it is possible to play those without spending any mana of their colors at all.

Answer 2

Trace of Abundance is not allowed in White-Green Commander deck.

903.4. The Commander variant uses color identity to determine what cards can be in a deck with a certain commander. The color identity of a card is the color or colors of any mana symbols in that card’s mana cost or rules text, plus any colors defined by its characteristic-defining abilities (see rule 604.3) or color indicator (see rule 204).

903.5c A card can be included in a Commander deck only if every color in its color identity is also found in the color identity of the deck’s commander.

Trace of Abundance's color identity is White, Red and Green. It can't be included in a deck whose Commander's color identity is White and Green.

You should be using magiccards.info's ci filter. It allows you to limit the results to those matching a color identity. For a White-Green Commander, you'd specify ci:wg. Of course, this is even more restrictive than c!wg, so Trace of Abundance will not be returned by a query with that filter.

---

If you were constructing a non-Commander deck and you wanted to search for "cards castable using only White and Green", I'm pretty sure you were once able to use (c!wg or c:c). This means that (c!wg or c:c) "Trace of Abundance" used to return Trace of Abundance.

Unfortunately, it appears this is no longer the case, so you'll need to exclude the mana symbols you can't use instead: -(mana>=u or mana>=b or mana>=r or mana>={U/B} or mana>={U/R} or mana>={B/R}).