When Forerunner of the Heralds enters the battlefield, you may search your library for a Merfolk card, reveal it, then shuffle your library and put that card on top of it. Whenever another Merfolk enters the battlefield under your control, put a +1/+1 counter on Forerunner of the Heralds.
Near Mint - $500
Lightly Played - $400
Moderately Played - $400
Heavily Played - $300
Damaged - $300
Near Mint Spanish - $500
Lightly Played Spanish - $400
Moderately Played Spanish - $400
Heavily Played Spanish - $300
Damaged Spanish - $300
Foil Prices
Near Mint Foil - $8.300
Lightly Played Foil - $6.600
Moderately Played Foil - $5.800
Heavily Played Foil - $5.000
Damaged Foil - $4.200
Near Mint Foil Spanish - $8.300
Lightly Played Foil Spanish - $6.600
Moderately Played Foil Spanish - $5.800
Heavily Played Foil Spanish - $5.000
Damaged Foil Spanish - $4.200