"Landfall - untap target land" is actually really dangerous. It's basically Stone-Seeder Hierophant's ability, but she's 4 mana. This is pretty close to Lotus Cobra but a lot harder to kill, with the ability to turn into a Noble Templar later on.

I'm working on a cycle of these "slumbering" critters. My goal is that they transform as soon as you drop a land and hit the number needed. until then though they give a boost. given that the landfall ability boost is limited to 3-4 times tops has made it a little harder to balance. Any thoughts on what the triggered ability should be for green?