In addition to Pokemon, the auction also featured some very rare Magic: The Gathering cards
This is already a problem that exists with recurring characters in MTG, but its often alleviated by only one or two variants actually being playable cards
Since Y'shtola repeatedly damages each opponent, cards that trigger off noncombat damage such as Curiosity, Ophidian Eye, Tandem Lookout, Helm of the Ghastlord, and Sigil of Sleep are powerhouses that quickly take over the game
What affects the value of The Eternal Wanderer
Losing the game because a player (preferably an opponent) has ten or more poison counters is a rule of the game
Any "as [this creature] enters" or "[this creature] enters with" abilities of the copied token will also work