Merfolk Raiders is a common Creature — Merfolk Soldier card from Mirage (MIR), collector number 75. Current market price: $0.22, TCGplayer market prices via Scryfall.
Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)