I'll try my best for this competition, but does the item must be according with the game story? And can you base it on something, or the idea have to be 100% yours?
Well, here are the items:
Mula:
+ 50 damage
+ 12 Armor
+ 300 magic damage
When attacked there's 20% chance to cast a dark spell called Nicatana that decreases the armor by - 5 for 30 seconds, the buff stacks up to five times, and deals 1,5xAGI damage.
Papagala:
+ 40% AS
+ 100 MS
+ 35 Agi
+ 600 magic damage.
+ 40% critical damage
Dosagalu:
+ 50% AS
+ 25 Agi
+ 200 damage,
+ 40% critical damage
When attacking there's 20% chance to cast a dark spell called Nicatana that decreases the armor by - 5 for 30 seconds, the buff stacks up to five times, and deals 1,5xAGI damage.
After 100 hits it'll summon a demon called Andhakara, with a 180-260 attack, 4.000 hp, 15 armor, a great AS, it gets +100% of the original stats each 100 Agi of the hero, and it has a spell that deals damage equals to the hero's AGIx1,5. Andhakara last until his hp reach 0.
Anista Mula:
+ 250 damage
+ 60 agi
+ 90% AS
+ 100 MS
+ 12 armor
+ 900 magic damage
+ 80% critical damage
When attacking there's 20% chance to cast a dark spell called Nicatana that decreases the armor by - 5 for 30 seconds, the buff stacks up to five times, and deals 1,5xAGI damage.
After 100 hits it'll summon a demon called Andhakara, with a 180-260 attack, 4.000 hp, 15 armor, a great AS, it gets +100% of the original stats each 100 Agi of the hero, and it has a spell that deals damage equals to the hero's AGIx1,5. Andhakara last until his hp reach 0.
Set Bonus: After 100 hits, Andhakara casts a spell called Nijavada Duṣṭa that destroys the enemy armor by -100 for 30 seconds.