How do I search for cards without a casting cost (excluding {0})?

Question

Ancestral Vision is an example of a card with a total absence of any casting cost: you can't cast it the ordinary way. In this case, you have to cast it using its Suspend ability.

I've just found that I have no idea how to search for these cards in Gatherer or in MagicCards.info. I can search for cards with a mana cost or converted mana cost of 0, but that also gets me cards like Accorder's Shield.

How can I search up cards with no mana cost in either Gatherer or MagicCards.info?

Lands are also in this category — it's fine if this search turns lands up as well; I can exclude those by their type easily enough.

Answer 1

You can search for cards that have a CMC of 0 but don't have a mana cost of 0 or that contains X. Here is an example on Gatherer. Many of them are transform cards or tokens.

Answer 2

You can actually directly search for all cards without a mana cost (or, more specifically, an empty mana cost) like this [direct link]:

http://gatherer.wizards.com/Pages/Search/Default.aspx?action=advanced&mana=+=[]

This can be input directly in the Advanced Search by submitting Mana Cost and =, without adding any value to the field.

This query also excludes lands and some tokens.

---

As far as I can see, there's no simple way to exclude the back faces of cards without excluding entire editions they appear in, or excluding their names one by one. The only data-wise unique qualifier is that the collector number contains b, however Gatherer doesn't seem to offer a search query for the collector number.