There are plenty of ways to mess with your opponent's cards, like forcing them to untap cards between turns or just messing with their ability to use effects like scry, surveil, or some tutors
Cryptothrall Cryptothrall is another card from Warhammer 40k
There are a handful of ways to abuse this Saga, and its high price tag reflects that
Once a card with flashback is cast from your hand, it remains in your graveyard ready to play again once you can afford to pay the flashback cost
Though it took 2 years for Modern Horizons II to cross that threshold (which Lord of the Rings was expected to surpass by the end of 2023), it was still a remarkable and, for a very long time, seemingly untouchable achievement for a set without any sort of crossover, mainstream appeal beyond Magic: The Gatherings already invested player base