This is because all three of the multicolour cards have white in their colour identities: there is one Orzhov (white/black), one Naya (red/green/white), and one Mardu (black/white/red).
This will most often be for the battlecruiser and mid-power Commander games that I tend to find myself in
If a card is good outside of Standard (such as EDH), do not expect it's price to drop until it receives a reprint, a banning (from a format it sees play in), or it is replace/realized to be not as good as it is
At the beginning of combat on your turn, if another Human entered the battlefield under your control this turn, create two 2/2 red Human Knight creature tokens with trample and haste
Back in the day, a set with more than 150 cards used to be considered quite the chonker - but if you check out our full list of card totals below, you'll quickly notice it became the norm, from around 2018 onwards, for each new main set to add over 200 unique cards