Aquitect's Will is a common Kindred Sorcery — Merfolk card from Lorwyn (LRW), collector number 52. Current market price: $0.31 (foil $10.90), TCGplayer market prices via Scryfall.
Put a flood counter on target land. That land is an Island in addition to its other types for as long as it has a flood counter on it. If you control a Merfolk, draw a card.