You may choose to target zero lands.

Whether a targeted land remains an 8/8 green Elemental creature depends only on whether it has an awakening counter on it, not on whether Liege of the Tangle is still on the battlefield.

If all awakening counters on a land are moved to a land without an awakening counter on it (perhaps by using Fate Transfer), the animation effect doesn't follow them. The first land is no longer an 8/8 green Elemental creature because it no longer has an awakening counter on it. The second land isn't an 8/8 green Elemental creature because Liege of the Tangle didn't target it.