There are three other versions of these five towers in the other divine realms, which would grant double the boost for each subsequent one they gain control of for a total of an 80% boost.
As if that is not enough reasons to cause a war between realms, if a Pantheon gains control of every tower in their realm, the boost to each stat will increase to 100%.
This made Legion begin to have an explanation for how the gods of the last era fell to the titans despite being so powerful. It also reminded them of how the ancient titans managed to wake up in this era.
The gods were fighting amongst themselves, which gave the divine beasts the opportunity to kill them and feed on them. This caused the ancient titans to awaken earlier than expected.
Now the Tower of Realms has appeared to cause a rift amongst the gods. They suspect that the gods of the last era were always fighting amongst themselves and became too weak to defeat the titans.