Domesticated Watercourse is a rare Land card from Mystery Booster Playtest Cards 2019 (CMB1), collector number 114. Current market price: $0.98, TCGplayer market prices via Scryfall.
Domesticated Watercourse enters tapped. {T}: Add {U} or {B}. {U}{B}: Until end of turn, Domesticated Watercourse becomes an Equipment artifact with equip {2}. Whenever equipped creature deals combat damage to a player, draw a card.