As Dragons tend to be rather costly, mana ramp and cost reductions are a great means of allowing a player to cast several Dragons within a single turn
However, in the app, that is not a problem, and players can use the same card to build a hundred different decks if they want
Miraidon ex has entered the chat #4 Miraidon ex has entered the chat Exactly my point, like why only focus on Miraidon
The mana symbols in Xenagoss own mana cost are counted when determining this
My real conclusion about blue here might just be that you should respect Devious Cover-Up, and it might change how control decks are built, though Unmoored Ego can punish people who go too far.
Once you know exactly what youre holding, it gets much easier to price it right