A certain crossover anime's nuclear-powered sword immortal

Shirou, who travels back to the Fourth Holy Grail War era of Type-Moon, is forced to step into the Holy Grail War.
Yesterday Once More, Blank Class Card, Son of the Sun, Unlimited Blade Works...
Death and protection, madness and mystery, heroic spirits and bonds, fakes and real objects, will eventually intertwine.
Every day you don't dance is a day you betray life.
Come, let us fight until dawn!
"This body is destined to be formed from the Infinite Sword!"