When Jadelight Spelunker enters the battlefield, it explores X times. (To have it explore, reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.)
The River Heralds found clues to a grand heritage below Ixalan's surface.
NM-Mint Foil - $0.50
Lightly Played Foil - $0.50
Moderately Played Foil - $0.50
Heavily Played Foil - $0.40
Damaged Foil - $0.40
NM-Mint Foil Non English - $0.50
Lightly Played Foil Non English - $0.50
Moderately Played Foil Non English - $0.50
Heavily Played Foil Non English - $0.40
Damaged Foil Non English - $0.40