Defense against Multidimensional Refraction Phenomenon

"Q: Gilgamesh has no skills in swordsmanship, would Assassin win if Gilgamesh is caught in the range of Tsubame Gaeshi?

A: Most likely, he will just defend with his armour, or take out some really unfair defensive armament that protects against Multidimensional Refraction Phenomenon, from the Gate of Babylon. However, Gilgamesh is capable of accurately assessing his opponents' abilities, so he would not consider having a battle of swordsmanship with Assassin the first place."

 Comptiq 2007-11 issue - Fate Dojo Q & A: