While updating osgameclones.com I came across another surprising discovery: the open source #MTG clone Forge now supports an adventure mode, where you explore a world map, collect new cards and abilities and challenge other AI opponents.
https://card-forge.github.io/forge/
Sound familiar? This is exactly the gameplay for Shandalar, making this perhaps the first open source clone of this awesome retro game! I'll be looking forward to trying it out myself.