Chatterfang
Chattering acts as if forest walk is active when i only had non forest basic lands (islands and mountains), and acted and was rendered as an unblockable creature.
1
vote
GondleKiir#68913
shared this idea
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Rezzahan#77802
commented
They probably had Yavimaya, Cradle of Growth on the field, a land that makes all lands into Forests, similar to Urborg making all lands into Swamps.