In order to do a frenzy attack, equip either the short blade or the sword. Once equipped, if you are facing a large number of guards, just keep attacking them, bouncing one attack to one enemy then attacking the next. If one of the enemies tries to attack you, while attacking another guard quickly press R1 then Square PlayStation3 or RB then X Xbox 360 . This will allow you to attack while quickly countering enemies. Another way is when the enemy dodges your attack then follows-up another attack. Do the same thing, but make sure your timing is good enough to allow you to survive even if there are six or more guards.