We need to go deeper

A week has passed. Steve now has a roof, and not a stone ceiling, over his head. He farmed enough animals to have a full set of armor. He has a full set of stone tools and weaponry. Steve is satisfied with his current life.

The voice in his head however, begged to differ. It says that there should be words scrolling on it's screen if everything was complete. Whatever that means...

The voice advised Steve to go mining deeper. It thinks that there are other ores other than coal. Potentially another item better than leather and stone. To make better armor, tools and weapons.

Now it's night. Steve had the confidence to go mining at this time. There are more golems in the village ever since a zombie killed a villager earlier this Minecraft week(Two real-life hours and 20 minutes).

Steve had gone down to deeper parts of a cave he had been mining in. He only found coal so far. Suddenly, he saw a new ore. It had brownish bits in it. He could mine it with his stone pickaxe. He encountered dark blue ore too. Also able to mine using his current pickaxe.

There were other ores too, which are near some lava. But the voice advised Steve to not take anymore risks to break blocks.

Steve decided that it was time to resurface. He could tell by the zombies and creepers inching into his view.

Upon reaching his house, he smelted the blocks he could smelt. The voice yelled "I found silver!". Though, Steve knows better. Steve was pretty sure it was iron.

The dark blue items he obtained looked strange. They looked like kidneys said the voice. The voice was gonna call them kidney stones for now. But Steve knew that these strange items had a purpose.