“Can be used to upgrade orange hero skills.”
The “Orange Skill Book” is an important item in Dark War Survival. It helps upgrade the skills of heroes with “S” rarity or “Orange” rarity. Upgrading your hero’s skills is very important. It helps make your heroes stronger in battle and improves their abilities.
Obtainable Through:
Below are the list of sources where you can obtain this item.
- Shadow Calls Event.
- Modification Contest Event.
- Attack on Titan.
- Faction Trials Event Shop.
- Season Shop.
- Special Offers.
- VIP Shop.
- Capital Shop.
- Arena Shop.
- Combat Shop.
- Ruby Shop.
- Mail Rewards.