You must complete the instance and talk to Fenrir (at the end of the instance) to unlock the Sarah Earring's enchanting NPCs. Upon finishing it for the first time, talk to Professor Bernhard to receive your first ring. You only get one free ring per character.
You can purchase additional rings from the Assistant Professor in exchange of 1 Shard of Gigantes.
Assistant Professor will allow you to enchant your equipped rings. The enchantments are random, but you can choose which category of bonuses you want. Each ring can be enchanted twice (3rd and 4th slot) and every attempt costs 4 Shard of Gigantes (there is a chance of breaking the ring).
CRIT or Critical (3rd slot)
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Name
|
Effect
|
Critical Lv2
|
Critical rate +2
|
Critical Lv3
|
Critical rate +4
|
Fatal Lv1
|
Critical damage +4%, Critical rate +1
|
Fatal Lv2
|
Critical damage +6%, Critical rate +2
|
|
|
Expert Archer or Parrying (3rd slot)
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Name
|
Effect
|
Expert Archer Lv1
|
Ranged Attack +2%
|
Expert Archer Lv2
|
Ranged Attack +4%
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Parrying Lv1
|
Perfect Dodge +3
|
Parrying Lv2
|
Perfect Dodge +4
|
|
Saving or MATK (3rd slot)
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Name
|
Effect
|
Saving Lv1
|
SP Consumption by -2%
|
Saving Lv2
|
SP Consumption by -4%
|
MATK +3%
|
MATK +3%
|
MATK +4%
|
MATK +4%
|
|
|
ASPD or Delay After Skill (3rd slot)
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Name
|
Effect
|
ASPD Lv1
|
ASPD +4%
|
ASPD Lv2
|
ASPD +6%
|
Delay After Skill Lv1
|
Delay After-Cast by -2%
|
Delay After Skill Lv2
|
Delay After-Cast by -4%
|
|
CRIT or Critical (4th slot)
|
Name
|
Effect
|
Critical Lv2
|
Critical rate +2
|
Critical Lv3
|
Critical rate +4
|
Critical Lv4
|
Critical rate +6
|
Fatal Lv1
|
Critical damage +4%, Critical rate +1
|
Fatal Lv2
|
Critical damage +6%, Critical rate +2
|
Fatal Lv3
|
Critical damage +8%, Critical rate +3
|
|
|
Expert Archer or Parrying (4th slot)
|
Name
|
Effect
|
Expert Archer Lv1
|
Ranged Attack +2%
|
Expert Archer Lv2
|
Ranged Attack +4%
|
Expert Archer Lv3
|
Ranged Attack +6%
|
Parrying Lv1
|
Perfect Dodge +3
|
Parrying Lv2
|
Perfect Dodge +4
|
Parrying Lv3
|
Perfect Dodge +5
|
|
Saving or MATK (4th slot)
|
Name
|
Effect
|
Saving Lv1
|
SP Consumption by -2%
|
Saving Lv2
|
SP Consumption by -4%
|
Saving Lv3
|
SP Consumption by -6%
|
MATK +3%
|
MATK +3%
|
MATK +4%
|
MATK +4%
|
MATK +5%
|
MATK +5%
|
|
|
ASPD or Delay After Skill (4th slot)
|
Name
|
Effect
|
ASPD Lv1
|
ASPD +4%
|
ASPD Lv2
|
ASPD +6%
|
ASPD Lv3
|
ASPD +8%
|
Delay After Skill Lv1
|
Delay After-Cast by -2%
|
Delay After Skill Lv2
|
Delay After-Cast by -4%
|
Delay After Skill Lv3
|
Delay After-Cast by -6%
|
|