In multicolored, if you are the lowest threat, then you often can fly under the radar and go far
The fact that chase cards are most commonly found in Collector Boosters has meant they sold out quickly soon after going up for preorder earlier in the yrar, and now command a high price on trusted resale sites like TCGPlayer
When City of Ass was printed, mana burn was still a thing (unspent mana would deal damage to you), so the extra half mana would harm you and in a way work like City of Brasss ping when tapped
Magic Secret Marked Cards This deck of playing cards looks like a regular deck, but the back of the cards are secretly marked with markings detectable only by the performer
In Modern, as I said, even the most threatening decks are threat-light
What started as an Un-set-only feature, or an electronic games exclusive feature, is now present on lots of black-bordered cards