Plurk paste

The entities are the overplot of Worm. They're a species of pandimensional beings with one drive - evolve. They stripped their own reality of resources long ago and struck out in pairs to do two things - make new realities, and keep evolving. Each time they encounter a world, they dissolve themselves into every possible attribute they've taken up, seeding the inhabitants of those realities with those attributes, splintering reality into dozens as they do so. Inside each reality, they nudge the seeded individuals to pit themselves against each other until a suite of attributes proves itself strongest, then make the realities fight until one of those is supreme. Then they absorb the strongest reality, and head for the next one.
The two entities that came to earth in 1982 were Thinker and Fighter. But a third, rogue entity collided with them while they were dissolving. Thinker and the Rogue died, but Thinker's attributes, including her core will, still got seeded all over Earth. Taylor's dad received that core will seed (called Administrator) but never triggered, and Taylor inherited it.
Fighter, left alone and therefore unable to complete the cycle, wandered around the earths for years. Without Thinker, he does't know what to do until a drunk guy starts screaming at him to use his powers for good one night. He does for a long time, until he falls under someone else's influence and destroys everything.
Cauldron is the obligatory nutball scientists, with a lot of dimension-hopping parahumans working for them. They found Thinker's physical remains scattered among them, and have been mining her to create new, more powerful, less random superpowers. When Scion finds this out, his rage has a focus and he actually has a thought, which is to make sure nothing in any reality attached to Earth survives.