But in all seriousness it is a cool concept, but I'm not sure if I agree with using lava. Olldeath is completely right. When I first played through the map, I just used water to make obsidian and completed it in 5 or 10 minutes. And I'm not sure why they are "Sky" Tombs if they are in lava, not the sky. Just some things to think about.
The first time I tried this, the tree ended up not giving any saplings, so I was pretty mad. I did all the challenges with the wood I had, but it lasted a lot shorter than I was hoping. The lava made it a lot easier to get to each of teh tombs.
The Meaning of Life, the Universe, and Everything.
i played this and i have way too many trees.
i was running around for like 20 mins cutting down trees!
while i was running around i thought,
"Would be awesome if they added a Nether to this...
I can EASILY make a Nether Portal here."
Then i got a big tree and went F*** and burnt it down using lava...
i HATE big trees...
Please change the tree to a birch so i dont got this problem...