Thor knew there were only two options now: either hit them hard enough to force a retreat, or keep grinding it out like a tug-of-war, waiting to see which side ran out of strength first.
"Thor." A childish voice rang out beside him. When Thor turned, he saw Reed's son, Franklin.
"What is it?" he asked.
"My dad and I made a machine that can open a passage to the antimatter universe. As long as we let the Annihilation Zerg from the antimatter universe in, the two sides can offset each other in numbers, and we can save ourselves some effort."
"Why is he still obsessed with the antimatter universe?!" Thor could not help saying.
"But this is the best option right now," Franklin said. "Even if humanity's strength is unlimited, our energy is not. Aunt Wanda is pregnant—we can't let her wear herself out."
Thor considered it and found Franklin's reasoning sound. It was not entirely because Wanda was pregnant. Humanity's weakness compared to mechanical life was mental fatigue. Fighting for an hour or two was manageable, but any longer and they might lose focus; longer still, and exhaustion would inevitably set in.
The two great empires were probably counting on that. They would first use cannon fodder to drain humanity's energy, then break through and inflict damage the moment humanity became distracted.
To prevent that, they needed rotations. But some roles could not be replaced, such as the Scarlet Witch. There were not many Scarlet Witches left, and several were relatively young. None of them were as powerful as the Central Universe's Wanda, and their speed at eliminating cannon fodder was nowhere near hers. Once Wanda grew tired, they would immediately be drowned beneath the mechanical army.
"Will your machine work?" Thor asked instinctively, though he felt the