1. About Sidian Cards can be obtained by defeating the enemy 'Irregular' that appears during class and exploration. These cards are the base unit of Sid Eternal called 'Sidian(s)', and players can collect more than 1,000 Sidians. There are five rarities of Sidian, from 1★(normal) to 5★(S.Rare), and level of card can be upgraded by fusing Sidian of the same card. Also, level of Sidian skill can be upgraded by using materials. 2.About Contents - Dungeon ■ There are Magic Dungeon and Production Dungeon as the main classes of Sid Eternal. Rewards vary with each class. Sidian and production materials can be obtained by joining a class and winning a battle. - Dorm ■ Your own Sidians can be grown up by fusing Sidian and leveling up Sidian skill, and be managed. - Exploration ■ Select Sidians collected and Send them to Exploration. Through Exploration, players can obtain various items and materials, and go through the charming story only for Sid Eternal - Ate...