You know, the "gold" cards... Like Femeref Enchantress.
I'm not entirely sure you can filter ALL multicolored as a whole, but if you filter the colors in which you seek cards, then tap the 2 options below the color bar, you get the cards in that specific color combination. Hope that helps somewhat.
Why exactly do you try to search all multicolored cards? Maybe there is a filter that can do what you want.
Because I have my cards sorted by color. I have a small stack of multicolored cards. I'd like to see only those, and all of those, in my inventory. I can double-check my inventory, or show someone all my multis on the app without having to carry my cards around.
Well, you could go to binders and create a new one, called multicolor or something, then add all your multicolored cards in there.
It's not the easiest solution, but the only one I can think of at the moment. Maybe someone else has a better idea??
Use predicate with card.colour = 6