Jonathan's Log,
29th May

Today I went mining and found some iron. Iron can be used to make armour, weapons and tools, solid blocks, anvils, etc.
After finding iron, I went deeper. The deeper I went the lesser the torch illuminated the stone-cold surface. Then I saw why.

A massive deepslate city, covered in a mysterious substance, with a strange sound making it all the more mysterious.
I decided to avoid it for now. So I went deeper into another cave, where there was a lava lake with lapis at the end.

After venturing over the lake to mine the lapis, behind it was a deep crater leading into a pitch-black, bottomless abyss.
I would explore those 2 areas later after progressing in this blocky world.