10th Challenge, 1st Puzzle

{ Challenge 45: Kill 15 real monsters, killing a fake will result in negative progress. }

'It's finally starting to get complicated.'

Receiving the new instructions, Leo took a second to digest their meaning. Only a little more than a couple of hours had passed since he finished disciplining Ken, but this was already his tenth challenge!

Just like the first and the second ones, the rest of the challenges up to now weren't that hard. At most, Leo had to run through groups of monsters to kill a specific type amongst them.

However, even that was considered straightforward compared to his tenth challenge. The instructions didn't give much information to begin with.

'Should be doable, but…'

Although Leo didn't think that this was a major obstacle, he was a bit worried about the escalating difficulty.

The monsters were still of average strength so far, but if locating the right ones and killing them kept getting harder, too much time would be wasted!