I am 100% down with this insanity.
The question is, do we use lava or a deadfall?
I would say that the only thing you are allowed to bring with you are picks/shovels...
And yeah, obviously no block placement.
How many layers? 1? 2? And do we use like one type of block? I think making a combination of dirt, netherack, stone and/or cobble would be good.