One of the items Shane had bought before was a [Uncommon] concealment potion with a long-lasting effect of 16 hours that was priced at 7 gold coins.
The potion would completely conceal his mana for the next 16 hours, making it difficult for wild stage beasts to notice him. Once he was noticed, it was likely that Shane would be underestimated due to his abysmally low mana fluctuations.
As such, Shane was confident in himself and he consumed the potion.
With slightly less than 40 hours left, Shane had many things to take care of in order to harvest the elemental crystals that he saw shining brightly in front of him.
Mining them right now would be a death sentence because the sound would attract the attention of the other beasts inhabiting the cave.
Before he could mine, Shane would have to clear the cave as thoroughly as possible.
The size of the cave mattered in this scenario.