The Ward keyword means the card can only be targeted by a challenge, and the 'Squeak' ability forces opponents to discard a card whenever you play a Floodborn character
Look, I understand that Monastery Mentor is a beloved Magic card that has made serious moves in older formats
Owing to the prevalence of catch-up ramp (Archaomancers Map, Deep Gnome Terramancer, Keeper of the Accord and the emergence of Archivist of Oghma), Path to Exile just about takes the spot
Thror's Map is a colorless legendary artifact that first finds you a basic land and then can be activated each turn to draw and discard a card - an effect that's colloquially called "looting," which is great flavor for a treasure map
Unfortunately, until interest in it dies down or restocks happen much more frequently, scalpers are going to keep making money.
Chill out and play with these retro frame snow lands