Aquitect's Will [Lorwyn] Swamp Mountain where X is the number

where X is the number of creatures those opponents control

but not for a way to control it

Set: Modern Horizons 2 Type: Instant Rarity: Common Cost: {4}{U}{U} Draw three cards

Set: Murders at Karlov Manor Promos Type: Sorcery Rarity: Rare Cost: {3}{R}{R} Destroy all artifacts you don't control

Aquitect's Will [Lorwyn] Swamp Mountain where X is the numberSet: Lorwyn Type: Tribal Sorcery Merfolk Rarity: Common Cost: {U} 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. There is nowhere on Lorwyn that the Merrow Lanes cannot go.