He was i-n-v-i-n-s-i-b-l-e

nothing could hurt him

(UNLESS THEY KNEW HIS ACHILLES' SPOT)

at least, he

T
H
O
U
G
H
T

nothing could hurt him

sure, this wasn't physical pain

B:U:T: It was even worse

Because,

as he sat there,

cradling her dYiNg

body

in his a*r*m*s

he knew there was nothing he could do

[he, the hero]

{the saviour of Olympus}

could do nothing to save the girl he loved

&& That was what hurt most of all