Deepway Navigator is a rare Creature — Merfolk Wizard card from Lorwyn Eclipsed (ECL), collector number 370. Current market price: $0.41 (foil $0.53), TCGplayer market prices via Scryfall.
Flash When this creature enters, untap each other Merfolk you control. As long as you attacked with three or more Merfolk this turn, Merfolk you control get +1/+0.