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 :

• Tail of Hachibi

  Forged with chakra of the legendary tailed beast, Hachibi. Increase critical chance by 15% but reduce max. HP by 20%.
• S14 Yabusa Knife

  Increases 4% attack damage and ignore 4% of targets dodge.
• Sealing the soul barrel
• Ultimate Taiko

  Recover 120 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Swordfish
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• S2 Solar Aura

  Increase agility by 3 and accuracy by 7% .
• Shigu Twin Blades
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• Apple Candy

  Increases damage by 5%. Has 3% chance to convert damage taken to HP positively.
• Red Shuriken Skis
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• 4th Anniversary Back Item

  Ninja Saga 4th Anniversary edition! Recover 50 HP and 150 CP at the start of every turn.
• Christmas Bag

  Reduce damage taken by 10.
• Colorful Snowflake

  Increase agility by 1. Has 15% chance to freeze enemy who attacks user (2 turns). Frozen target cannot move but damage taken is reduced by 80%.
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• Roasted Turkey

  Restore 20 HP every turn.
• Mini Scroll
• Mirror of Thousand Hands
• Toxic Spider Web

  10% chance to apply Restriction on enemies who attacks the user for 1 turn.
  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• Carrot Launcher

  Increase agility by 1. (Easter 2011 Limited Edition)
• Holiday Doll

  Expecting Santa in every year! Critical and dodge rate increase 3%.
• S10 Frostguard's Shield

  Shield of the valiant warrior Tundra. Increase agility by 2. Has 17% Chance to stun target when attack with weapon for 1 turn.
• Bell of Fortune

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Yatai Lantern
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.