Cursed Sword:Nice attack, but makes you lose some HP while attacking or walking.
Wind Blaster Bow: Wind elemental, can make enemies walk slower.
Vampire Dagger:absorb some % of the attack to the user's HP
Reversal Halberd: The less % of your max HP you have, more is the attack of this weapon.
Endure Armor: If someone hits you and you die, you have a certain % to, instead of die, staying with 1 HP.
I'll edit later with more things =S