It seems I overestimated their strength

Once again, Alex climbed onto Arthur's back and settled into a comfortable position.

"Arthur, take off!"

The undead resumed their crossing of the swamp, this time without encountering another evil tree spirit, which Alex felt somewhat relieved about. She figured if another one appeared, her Mana Points would likely be depleted.

With no other creatures to interfere, the undead army quickly crossed the swamp. 

The level 9 bone beast werewolves, donned in the evil tree spirit suit, moved the fastest. Alex suspected that the suit had a hidden effect that allowed its wearer to move effortlessly through the swamp.

Arthur, carrying Alex, flew ahead and soon hovered above the Goblin tribe. She saw a small valley below, dotted with numerous torches, each marking an entrance to a hole, densely packed like a honeycomb. The sight gave Alex goosebumps due to her fear of clusters.