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I was trying to use a Manaless Dredge Deck and as the name hints (in case you don't know the "type" already) I should have no mana (aka no Lands), but I am having some issues: Magic likes to put 10 lands in that deck (who knows why), thus making my deck a non-manaless (sorry) with 70 cards..

Does anyone know how to solve it? I already tried with Riak's Deck Bulder to set "Number of spells that count as land" to 20, but it's still adding lands

Set that back to 0 and set the field that is initially -1 to 0 (so all fields in that section of the window are 0). It should be something like "Ignore Cards with CMC over" or something like that. See if that helps.

It worked just fine, thank you a lot