The Card Awaken, also known as Classic Awaken, is a Event that occurs periodically through the year, where you can upgrade some Monster Cards past Level 8, gaining new skills, turning skills into better ones, increasing Health Points or Damage Types,etc. When the Event opens, it will stay active for one week.
To awaken a card, you need that card already at Level 8, one Evolution Stone, 90 Legendary Monster Soul Crystals and 1000 Legendary Monster Scrolls. Before upgrading, the current and awakened versions of the card will be shown side to side, together with the materials needed. After upgrading, the card will have "(Enhanced)" on its name and will still be considered Level 8 for the Curse skill effect.