Talk:Babylonia Chapter Release (US)/@comment-37189271-20181217093108/@comment-25344672-20181217113727

I haven't got to this point yet... but going of what FGOHikaru said... it does make sense.

So we all know CasGil is way wiser and smarter than his EUO warrior self and well everything has went according to cake (Tranlator note: 'Cake' means 'Keikaku', 'Keikaku' means 'Plan'(TFS reference))

The thing is, Gil knew he lost most of his power in exchange for knowledge as he opened up his treasury and gave it all upto protect his Kingdom and people. He also knew that the Summon system ca be exploited as he summoned Merlin and other servants from the future (technically Merlin was still alive and the reason he could be summoned was because he doesn't exist in the past).

He knew he already exist in the throne of heroes and using his body as a catalyst he can summon himself and manifest his EUO self, a younger and stronger version of himself that still has his treasury and Gate of Babylon intact that still possesses Ea.

Bare in mind that the throne of heroes exist outside of time and space, a hero from the future is treated the same as a hero from the past. The only thing you need is a catalyst... The snake skin or Gil body would be a catalyst to summon himself

As for Archer, that was already explained. Even though Shirou was still alive and it was uncertain whether or not he would become archer specifically, it was possible to summo him, because Rin used the Pendant as the catalyst but it wasn't her's but rather Archer's pendant that served as the catalyst for summoning.