Archer looked down towards the distant, waveborne battle of Heroic Spirits from high in the air.

"What a disgraceful sight..."

The King of Heroes rode upon a shining bright ‘ark’ made of gold and emerald, 500 meters above the ground.

Gate of Babylon – the treasury of Gilgamesh, the primeval hero who once owned all of the treasures in the world, stored within it the original forms of many treasures that were praised by the legends and myths of latter men.

The golden ark that he is using to float in the air is also one of those 'divine secret treasures'. Indeed, this is the flying contraption that was passed from Babylon to India and recorded in the two epic sagas Ramayana and Mahabharata as the "Vimana".

- Fate/Zero: Act 10, Part 2