The main problem is that this card does not grant any additional, passive lore, which I think is the strongest pull of the Location cards in general
There are much cheaper alternatives, after all, if you're playing with a Green deck: you can have an Allosaurus Shepherd, Destiny Spinner, or Prowling Serpopard for half mana or less cost than Chimil
As I sit across from Gavin Verhey, principal Magic: The Gathering game designer and set design lead for Final Fantasy, Im daunted by the task of playing someone who literally oversaw the development of every card in my hand
It lacks protection and wont usually make an immediate impact on a game, but when this big mana commander survives a full turn cycle its likely to create an insurmountable advantage
Sowing Mycospawn Sowing Mycospawn has a kicker cost that turns this one card into a two-land swing with a 3/3 fungus to show for it