Traps
Emery went back to the burned-down settlement that had been ravaged by hordes of Abyss creatures and started to rebuild the place. He began by forming a tall and thick wall that surrounded and protected the settlement from all directions, the wooden palisade alone was far from enough to face the threats on this planet.
The reason he rebuilt and reinforced this wrecked settlement was that the place would be a midpoint to gather the survivors that had been rescued before moving them to the main base near the transport.
After the wall was completed, Emery proceeded to make deep pits in a few strategic spots around the settlement. By the time he was done, Arcana had returned bringing more Abyss creatures in tow.
As expected, being enchanted by Arcana's skill, the creatures entered the pits Emery had made like brainless fools.