Shane decided not to test the Orbs since they were only single-use items and he only had five of them.
It was too much of a waste to try one of them and see how good or bad they were. Anyway, he could assume that they weren't that great since they could only summon low-tier Undead Creatures.
He believed that any of the Survivors who had reached this point should be more than capable of dealing with such Creatures.
Anyway, he also felt a bit disappointed as he thought that he'd get to loot more from the Necromancer. One Item Upgrade Crystal and five orbs seemed a bit too stingy but after realizing that he also took his Cloak, Robe, and Dagger, Shane finally felt comfortable seeing that the Necromancer was vanishing into shattered light.
Shane then returned to the Wild Shelter to take everything there.
As he returned, he confirmed that all the Undead Summons had disappeared and from where their bodies had disappeared lay a black crystal.