When Merrow Harbinger comes into play, you may search your library for a Merfolk card, reveal it, then shuffle your library and put that card on top of it.
Near Mint - $2,500
Lightly Played - $2,000
Moderately Played - $1,800
Heavily Played - $1,500
Damaged - $1,300
Near Mint Spanish - $2,500
Lightly Played Spanish - $2,000
Moderately Played Spanish - $1,800
Heavily Played Spanish - $1,500
Damaged Spanish - $1,300