Blue is the backbone of most artifact decks, and leaning into it as the only colour in your deck allows you to really go in on its many, many strengths
Otherwise, the Amber characters who tend to be on the Villains side in their respective stories are the henchmen or assistants characters such as LeFou or Mr
His first to discard and draw is like many other Red walkers
(When MufasaBetrayed Leader is banished, players can draw a card from the top of their deck
White has this small theme of enchantment and equipment/artifacts matter with commanders like Alela, Artful Provocateur, so Forge Anew can fit there as well
Ive seen a lot of people underestimate the strength of Elspeth, and I think that largely has to do with not seeing the Escape mechanic in action yet