You might as well compare with these Back Items so you can decide which Back Items you're gonna use for ninja Saga Pvp or in Hunting House for easier killing the boss or your opponent in ninja saga PvP
These Back Items might have better effect . Here we go :

• Sand Gourd
• Jaws

  Ignore 4% targets dodge.
• Griffin Thunderball

  Increases critical rate by 3% and dodge rate by 3%.
• S50 Blood Shade Magatama

  Created with blood and molten lava, the blood shade magatama consumes the life force of anyone with malicious intent. Has a 8% chance to absorb 10% of the attackers max HP and 8% chance to convert any damage taken to HP.
• Red Shell
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Christmas Deer

  Increase critical chance 2% and critical damage 6%.
• Shigu Twin Blades
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• Decorative Rope
• 2011 Fortune Lantern

  Ninja Saga 2nd Anniversary Carnival!
• S68 Supreme Faerie Wings

  Recover 20% extra CP when charge. Has 10% chance to convert damage taken to HP positively.
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Childhood Memories

  Mothers Day 2011 Limited Edition
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Dark Cry Raijinco
• Turkey Tail
• S31 Yabusa Dual Head Spear

  Increase 4% damage and 4% critical rate.
• Wine Gourd
• Iron Tortoise Shell

  Reduce damage taken by 200.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Hidden Green Umbrella
• Gunbai: World Peace