Unity

Unity is a Metaphysical level Magic Spell done once by Hermes during it's battle with The Dragon. This spell consist of directly bonding every human conscience through absolute emphatic links, in similar ways to a Hive mind, but maintaining each persons individuality intact, although this is contradicted by "Herme's Lie".

Effect in the war
When Unity was active, every person had instant knowledge of what any other person was thinking and feeling. This made possible the absolute efficiency of the human war effort against the Abyss spawn.

Unity made possible coordinated strikes of thousands of fighter jets, perfect triage and first aid treatments, immediate communications and coordinated supply lines, Clockwork logistics and instant expert level training of every field.

Tearing
When Hermes sacrificed itself to push The Dragon back into the abyss, Unity bonding was teared apart, not with a clean disconnection, but with a tearing of the link. This led to Post Unity Reality Dissociation Syndrome.

Remnant unity
intermediately after the tearing, the broken remnant of unity was still capable of linking basic human thoughts and feelings, functioning as an enhanced emphatic connection between nearby users.

Marcel Ezquieval used the remnant to mount a counter offensive and rally the troops during the beginning of the Crusades

After effects of unity
Besides the Post Unity Reality Dissociation Syndrome, leftovers of Unity made some of it's users highly emphatic, being able to use simple telepathy and emotional reading. This change seems to have altered those uses in a genetic level as in very special occasions, their descendants have shown to inherit this trait.