I have recently started rewatching FMA brotherhood, and noticed some things I was confused about concerning Father.
He uses the pipes to spread the Philosopher's Stone beneath the nation of Amestris. The purpose behind this is to act as a barrier between the tectonic energy of the earth's crust, where Amestrian Alchemy gets its energy from, so that he can stop others from using Alchemy at any time.
he placed himself under what would become Central Command and used himself as a buffer against tectonic energy so alchemists would actually use energy derived from the souls of Xerxes contained within himself.
How is Father able to stop people from performing alchemy? And if the people in Amestris were partly using a philosopher's stone, wouldn't they be able to bypass the laws of equivalent exchange?