Mimee Worm

When Mimee Worm is dealt combat damage or becomes the target of a spell or ability an opponent controls, tap target land an opponent controls and
add 1 mana of any type the land could produce to your mana pool. The land doesn’t untap during its controller’s next untap step.

"It must stay in the border between the plains and the desert because despite its sensitivity for sand, it requires constant moisture to maintain its health."
-Dazil Scavenger