Reiji wanted to collect the Beast Cores of the Minotaurs and other Evil Beasts that Fern has killed within the forest.
After all, the latter doesn't seem to be interested in those while he has several students with him that he would sometimes need to reward.
However, Fern's reinforcements might arrive in time and cause trouble to the two. He doesn't know whether his Stealth or Traceless would be effective so escaping might be difficult.
"Master… Are we going to return to the village?" Szaaz asked after ditching Fern mid-air. He just suddenly vanished after throwing out a green smoke to use as his cover.
Fern even thought that the Cursed Arcana would ambush him inside the smoke but as soon as everything became clear, he realized that Szaaz has already escaped!
No matter how hard the sword tried to find them, he was unable to locate them with his current condition.