How to make and Upgrade Quivers
Тhere are 5 levels of Quivers 
that can be make in Chaos Goblin Machine and each one will going to help you to in Elf upgrading gear. Quivers have excellent options and each level have basic damage upgrade !
How to make and upgrade Quivers :
1st step is to create the 1st level Quiver 
for this purpose you need "Quiver Upgrade Stone" 
that drops in “Chaos Castle 7” (more about Chaos Castle event you can find →Here←
In Chaos Goblin Machine on “Regular Combination” you need to put the following ingredients :
x1 Quiver Upgrade Stone
x10 Jewel of Creations 
x1 Jewel of Chaos 
In case of success:
Quiver Level 1
In case of fail:
All the items that were put into combination will disappear
Quiver Upgrade :
Quiver Level 2 Chaos Mix :
x2 Quiver Upgrade Stone
x1 1st lvl Quiver
x10 Jewel of Creations
x1 Jewel of Chaos
In case of success:
Quiver Level 2 
In case of fail:
All the items that were put into combination will disappear
Quiver Level 3 Chaos Mix :
x3 Quiver Upgrade Stone
x1 Quiver Level 2
x10 Jewel of Creations
x1 Jewel of Chaos
In case of success:
Quiver Level 3 
In case of fail:
All the items that were put into combination will disappear
Quiver Level 4 Chaos Mix :
x4 Quiver Upgrade Stone
x1 Quiver Level 3
x10 Jewel of Creations
x1 Jewel of Chaos
In case of success:
Quiver Level 4 
In case of fail:
All the items that were put into combination will disappear.
Quiver Level 5 Chaos Mix :
x5 Quiver Upgrade Stone
x1 Quiver Level 4
x10 Jewel of Creations
x1 Jewel of Chaos
In case of success:
Quiver Level 5 
In case of fail:
All the items that were put into combination will disappear.