...that turns a usually-smooth game into complete insanity.
...that just appears out of nowhere and spikes the difficulty so high that you are left speechless wondering WTF just happened.
...that no matter how many times you played the game, makes you his bitch in the first attempt at defeating him.
We all have That One Boss. For me, that's Sephiroth in Kingdom Hearts 2. Never playing the arena area much in KHI, I never faced Sephiroth before. I just come to the end of Hollow Bastion, and this one winged dude is waiting for me. I recognize olde Seph immediatly. The boss battle then begins. I try to attack, he blocks, and one attack from him kills me. Just like that.
I tried time and time again, to defeat him I had to grind to lvl.99, go to a GameFAQ to see what were the most OP moves, and create Ultima by going back and forth to collect the Orchaluims+.
AND EVEN THEN THE SON OF A BITCH TOOK 27 TRIES TO KILL.