You can choose to loot a card, grow the equipped creature with a +1/+1 counter, or untap two lands (which basically pays for the equip cost)
Card prices are up 770.4% all time, up 6.4% over 30 days, and down 3.4% year-to-date
Its also the reason for why they have multi-colored energy cost requirements
Naochika Morishita Maekawa Yuichi Tada Foo Midori Norikatsu Miyoshi Toshiaki Takayama Mid Hagiya Kaoru Yoshitaka Amano Sansyu Lack Clover.K D-suzuki Daisuke Izuka Hitowa Hisashi Momose Miho Midorikawa Raita Kazama Kaida Yuji Naochika Morishita Yukie Tajima Fuzichoco Shishizaru Sansyu Hozan Shinomaru Nablange Masuda Mikio Yamamoto Akifumi Ryota Murayama
Being combined with tempo cards of the day like Winter Orb, they'd make the cut in powerful decks called "Frozen Fish" and then after the first typal set ever printed, Fallen Empires pushed the Merfolk creature type as a supported group even more
Budget for all four products, or find the promos as singles on TCGPlayer