Magic The Gathering: Merrow Riverways - Lorwyn Theme DeckProduct Details Merfolk are slippery creatures, and you'll use that to your advantage in the Merrow Riverways deck. Plenty of Merfolk, like Streambed Aquitects and Silvergill Douser, have abilities that cause them to tap. Others, like Drowner of Secrets, let you tap any of your Merfolk. Combine them with cards that untap your Merfolk, such as Merrow Commerce and Stonybrook Angler, and you'll start swimming circles around your opponent. What can you