Legends:Practice
Practice is a play mode in The Elder Scrolls: Legends. It allows you to play matches against AI opponents of difficulties ranging from Novice, Adept, to Expert. This allows you to become familiar with the game without any stakes at hand, and test out strategies for decks. However, you cannot earn titles or daily quests.
Adept and Expert are initially locked. You need to win a match in Novice to unlock Adept, and win one in Adept to unlock Expert. Upon winning, you will receive 5, 10, or 15, depending on the difficulty. The number of Soul Gems you can earn through this mode is capped at 300 per day.
A list of all opponents and their decklists in each difficulty can be found here.