It was strange watching her own life play out before her, but Ta experimented with her duplicate universe, playing out possibility after possibility.
Don’t change anything before Da is born. The smallest tweak can prevent a pregnancy or change the children completely. You can’t save them if they don’t exist at all. Obviously, you can’t make a change after Da’s death if you want to do any good, so that limits the realm of possible changes to a span of a few years.
What could save Ta? Would it be simple to engineer the aggressive tribe never running into Ta’s tribe at all? Ta knew the tribe had a shaman that consulted goat bones tossed in the air. She had been surprised to know there was nothing guiding how they fell besides a few simple rules like gravity and momentum.
But what if something did guide them? She couldn’t do anything like moving the bones directly, that would be caught and reversed immediately. However, what if she could change the way they were thrown until a configuration came up that led the shaman to choose a different path?
Something as simple as sneaking a little serotonin out of the shaman’s brain that morning could be enough to slow him down and change how he threw the bones. Then she’d run her universe until she saw him say to go somewhere else, or if he said the same thing, she’d reset, change something else, and hope for the best.
After 100,000 tries, Ta realized that the shaman was a hack. Seemingly no configuration of bones had any effect on his decision.
This was especially frustrating because it was contrary even to his own conscious thought process. No matter where the bones fell he found a different interpretation and was utterly convinced he had divined the will of the spirits. The ultimate conclusion of his interpretation was always the same and, since Ta was now the closest thing to a spirit actually intervening in this universe, always wrong.
As the shaman delivered the decision to move south towards Ta’s tribe for the one hundred thousand and second time, Ta summoned a confluence of electrons above his head and watched a bolt of lightning strike him dead. While the tribe stared in confusion at their wise man’s smoking remains, Ta reset her universe once more.
Ta glowered at the tribe performing its morning ritual for the 100,003rd time. She watched the man who had killed her swiping at his friend with a club. As he had thousands of times before, the friend caught the blow with his own club and pushed her killer down. Her killer tumbled and leapt from the ground back at him, laughing. These guys were always fighting, and they would go on to defeat her tribe with inferior weaponry and kill her and doom her son to premature death once more.
Well, this time they wouldn’t. She summoned a mountain six feet above the tribe and watched it fall and crush them with an earth-shaking thud. As for the real tribe, she would just have to find another way to stop them.