The next series of tests Alex was going to perform were tests with 3 types of Spirit roots at once.
Unlike the tests using only two spirit roots, which could have a total of 21 different variations, using 3 spirit roots pushed that number up to 35. While that wasn't that big an increase for him to worry about, the greater issue came with the actual number of tests he had to do.
Even without counting all the tests he was already skipping by not making his spirit roots weaker or stronger than they were or by changing his neutral root to add on, he was already doing 63 different tests for when just using 2 spirit roots.
One for cultivating with the first spirit root. One for cultivating with the second spirit root, and finally one for cultivating with both of the spirit roots.
Were he to do something similar with three spirit roots, he would need to perform 140 tests at the least. At 2 months per test, that would take him 240 months, which meant another 20 years of testing.
