Nightmares!
Leo's starting journey inside the Gate was neither long nor short. He didn't come upon any more monsters as he passed through the wide expanding tunnels, but things started to look different soon.
Just as the passages became more and more narrow, the shimmering walls dimmed down as Leo progressed forward.
'I should be getting closer.'
The structure so far felt like it was meant for sightseeing rather than fighting. However, once Leo passed it, he could already hear the sounds from afar.
After a period of monster drought, Leo now found a half dozen of them prowling through a tight passage.
Although there were more of them, they all still did the same. Gnawing at the walls!
'Single-minded desire.'
Leo had an idea why they targeted the mesmerizing walls, but it was irrelevant to his quest. He wanted to quickly pass the tedious part!