omg...it causes tension and what do you mean by him?
No, no, no my poor misguided friend. These filler episodes are NOT to build tension. Quite the opposite in fact. These episodes RAPE TENSION WITH A BLADED DILDO.
You see, you get tension by lets say, having one character who somewhat resembles a mummy return from the dead, get sealed, return AGAIN cause he's just a boss like that, and then say he shall summon HIM now (the anime/manga does say "him"). THATS tension. You want to know who he meant. And guess what? In the manga this happens ONE chapter later, but you get teased at it until the last page. TENSION (seriously, read the manga, cause Im guessing you don't, in which case you're missing out, especially on THIS. Hell man, even Naruto Storm 3 is AT LEAST 2 months ahead of CANON anime, so you factor that in with the current episodes and a video game is about 4 months ahead of the actual anime, thats just sad).
Now, Im not going to spoil HIM to you, and I really hope no one else does. All im saying is MANGA. CHAPTER 558. START READING. YOUR WELCOME. The truth of the matter is, these filler episodes are used as nothing more than to waste time and get episode counts up. Filler is supposed to ONLY be used to allow the manga to exceed when both get near each other, however the anime is so far behind at this point the ENGLISH DUB may catch up. (English version is now in the middle of the Pain invasion filler arc). Its a sad day indeed when filler requires an "arc" after. Its a sad day when filler epsiodes spill into the next intro. Its a sad day when this once great anime gets reduced to nothing more than bad animation and disappointments.