Hello!
That's the hardest level for sure, the trick is:
1. Use the Druid to open space and use her body to hold the wood when the warrior push it.
2. Ignore the second wood, you are going to use only the top one.
3. During the solution you will need to cut almost all the grass but remeber that you can grow the grass to avoid the wood go to far.
Let me know if you have success i can sent you a video with the solution!
Also, let me know what do you think in general about the game!

