So this empathions is "memory"?, adventurer hold rank 3 in INT because they are human, have emotion and stuff and when they die, part of this left and goes to the moon (mother server?), alien want more because it make them stronger, so they start going aggresive (harvester)? This whole war thing might be caused by those genius/harvester, afterall more adventurer dead mean more empathions for them.
"May your warm empathions light your future"..."may your warm memory light your future"... Yeah sounds fitting for me.
Now that things suddenly went sci-fi, am i the only who imagine when shirou and gang reach moon, they will encounter a temple with a giant ring portal inside ala stargate?