How many episodes of The Legend of Xiao Bing Bing can buy heroes with Titan essence?

Level 30. The Legend of Xiao Bingbing (the original name is The Legend of the Knife Tower) is a card-based mobile game developed by Shanghai Lilith Technology Co., Ltd. and operated by Beijing Zhongqing Longtu Network Technology Co., Ltd. After the game player reaches level 30, the Titan Essence Store will be unlocked, and players can buy enough heroes in the store. The game tells the story of Sargeras leading the Burning Legion to invade the world. Players can play heroes such as Dragon Knight, Dark Lord, Colossus, Dark Knight, Captain and Moon Goddess to resist the invasion of demons.