Skill Reinforcement

What is Skill Reinforcement?
Skill Reinforcement is a game mechanic to increase level a servant's active skill. Once reinforced a skill will gain a level and its effect will be increased.

How to Reinforce a Skill?
You can reinforce a skill anytime by choosing a servant and skill you want to reinforce from Skill Reinforcement menu.

What do we need to Reinforce a Skill?
To reinforce a skill you will need some skill reinforcement items depending on class of the servant and the current level of the skill you want to reinforce. For a low level skill you will some class Gemstones (e.g. Saber Gemstone for a Saber class servant), after that you will need some class Spellstones (e.g. Saber Spellstone for a Saber class servant), and for a high level skill you will need some class Enigmastone(e.g. Saber Enigmastone for a Saber class servant).

List of all Skill Reinforcement items
For list of all skill used for skill reinforcement sell Skill Reinforcement Items