In the room beside the Galactus Engine hall, Helen chattered away to Harley and Barry about her experiences in the Zombie Universe.
Barry listened with rapt attention, but Harley found it rather boring. Since Helen's guardians were present, they strictly followed the rule that minors were not allowed to drink. Not only were they forbidden from drinking, they were not even allowed to be in the same setting as alcoholic beverages. While everyone else was enjoying themselves in the hall, the three children had been banished to the room.
Harley held a glass of orange juice in boredom until Helen mentioned Ghost Theory. Then she finally grew interested. After thinking for a moment, she said, "Since the physical laws of our two universes are so similar, maybe this works the same way too. Do you remember when we were studying at Kamar-Taj and the teacher explained the principles behind summoning circles?"
Helen thought for a moment, then nodded. "I understand a summoning circle as a search engine. Different kinds of runes distinguish different filter categories, and mages can freely choose the filtering conditions under each category."
"Once all the conditions are selected, they activate the magic circle. Summoned beings that meet those conditions receive a specific signal, and they can choose whether to answer the summon."
"Of course, to improve the chances of success, mages place corresponding sacrifices based on their filtering categories. If the target senses the aura of a sacrifice it likes through the circle, it is more likely to answer the summon."
Harley raised a finger. "Then couldn't Ghost Wave Theory also be understood as Summoning Wave Theory?"
Harley picked up a sheet of paper and a pen from nearby, sketching as she spoke. "A summoning circle is basically a wave-transmission device that can tune frequencies. When