Additionally, any spell with Proliferate will be able to increase the number of Stun Counters on a permanent
Karlach, Fury of Avernus (65k, prerelease foil $37) City on Fire (72k, FEA $7) Stranglehold (12k, Judge foil $8) Thrill of Possibility (228k, Mystical Archive 50) Dolmen Gate (38k, Lorwyn pack foil $120) City on Fire feels like it should have gotten there, but Karlach being in so many decks is a testament to the awesome ability to gain a second combat, with first strike added, for no cost beyond her own
They are one of the best creature tutor effects out there
Challenger decks are 60-card decks that are designed for play in a format called Standard
Only 77 gold Travelling Chocobo cards have been printed, making these cards a rare and much sought-after collector's item
Therefore, it stands to reason there are fewer copies available, and that Bloodthirsty Adversary is more susceptible to price spikes