Hunting certain monsters would count as a great feat. For example, killing the Mamonas (a giant, gluttonous whale) would work. 

It was a raid boss that inhabited the Golden Desert, and there were several stories passed down about it.

The Golden Desert was originally a lush grassland. However, the Mamonas came and ate everything in sight, and spat out sand. Thus, the area eventually became a desert. 

That was just how gluttonous it was. It was equally as strong too! Defeating the Mamonas would definitely count as a 'great feat'.

However, Kang Oh shook his head.

'It's impossible.'

Players weren't strong enough to take it down yet. Dragons, Mamonas, Vivolga, Titanos, Liviola, etc. were all beyond their reach. 

Kang Oh looked for monsters that satisfied two conditions: hunting them had to count as a great feat, and killing them had to be within the realm of possibility. However, he couldn't think of anything that would fit those two conditions.

'What about monsters that aren't well-known?'

In other words, monsters that had never been seen before, but were written about or there were rumors of.

Kang Oh tapped his finger as he thought about it.

"Ah!"

A light bulb went off in his head.

"What's the matter?" Sephiro asked.

"I found...