Take this case from the past: when it was revealed that Lisias Appeal would be in the September set Paradise Dragona, the original Lisia SR from Celestial Storm shot up in price and trading volume, causing the value of the Celestial Storm booster box to climb as well
Other anti-boardwipe effects like Heroic Intervention can also help here, but those will only protect your cards for one turn, while Teferis Protection protects you for three
Once Brotherhood Spy's ability has resolved, removing the legendary Assassin (or Assassins) you control from the battlefield or causing them to lose the legendary supertype or Assassin subtype won't cause Brotherhood Spy's ability to stop applying for that turn
With RtR block being so gold-card-centric, it is unfortunate, as it makes the year look less powerful than it is for other formats
1 Like EnlightenedBulbasaur November 2, 2020, 4:17pm 5 You present your argument as if the evidence for the cards being made in 1995 is conclusive, but in fact its far from that
Getting to draw a card for doing the right thing is all kinds of positive reward