An alternate cycle of simple dual lands that would enable two-colors but also not erode the color pie and create overpowered 4 or 5 color decks. : r/magicTCG
Amazon.com: Magic: the Gathering Core 2020 Common Dual Land Set (1 Each of 10) : Toys & Games
Better than Duals | Article by A. E. Marling
Made some original dual land proxies, MPC-ready album in the comments : r/bootlegmtg
The Original Dual Lands: History And Where to Find Them - Draftsim