Wizards solution was to shift those cards into the main set instead
Some of the best Orzhov cards are not technically gold cards but do need to be played with access to both colours of mana to be worth it, as such the top ten is a top thirteen just in case you don't think they should count
[6] These restrictions are usually imposed for balance-of-power reasons but have been occasionally made because of gameplay mechanics
So often do people greedily play the powerful card over the humble Chromatic Shape and never see their error as the heroic work of the Chromatic Shapes is so hard to even notice
Taking Advantage of Starting Intensity More often than not, cards that get a sort of charge from other effects like Drix Interlacer are one-use effects, but in this case, Drix Interlacer can be used multiple times thanks to the power of Alchemy mechanics
You should also consider your deck's mana curve, win conditions, and strategy