Bazett and Lancer attack Ryudo temple, and are utterly humiliated by Assassin. Witch!Medea's description shows how magnificent he had been:
Lancer, who had by himself managed to put up a good fight against both versions of Medea of Colchis at the same time and had only retreated due to being overwhelmed by her counterpart's Bulls of Aeaea, had been defeated in five seconds.
Before she had even realized what was going on, having been preoccupied with her research inside the mountain, her Servant had dealt exceptional damage to both Master and Servant without even revealing himself, forcing them to retreat.
Assassin pretty much screws up Archer and Rider with ease.
In chapter 31, Assassin demolished Zouken's workshop and nearly killed him, driving him to desperation with embarrassing ease.
Not to mention Sakura actually fighting back against the Shadow after realizing what was going on.