u/DutchGuyMtG89

Coming from MtG, I have learned that a solid manabase is the basis of any multicolored deck.

How important are, for example, the beta exceptional dual lands to a stable multicolor manabase? Or are there even better lands?

Pretty new to the game (1,5 boosterbox of gothic deep so far, i have 1,5 more sealed) and would like to build some casual decks with that to teach my partner. And I want to make sure we avoid "colorscrew" feelbads as much a possible.

TLDR: Do I need to buy beta duals/other good manafixing lands for my multicolor decks to function properly?

As the title says. I opened a box, and am enjoying building decks with those cards a ton, but would like to add some specific cards (and try out some other avatars). I come from MtG and am used to cardmarket to buy singles. Does a similar thing exist in the EU (i am based in the Netherlands)? Input much appreciated.