All the missions in the Demon Fiesta should be visible to the player.
There is no benefit to hiding the tasks from the players behind locks. Some require evolving multiple 3* and 4*. If these missions were known beforehand, we could start leveling up the 4* units and start saving the necessary evolution materials. And especially the task on day 7 which says to level up a skill 40 times. This requires a lot of onyx to complete. But since these sudden missions are revealed in 7 days, a player has to scramble to level up units, collect onyx and evo material as the Demon Fiesta expires in 4 days.
This is comparable to units that players still don’t have in their inventory. Although these units are unavailable at the moment, we can still click on the skills tab and see their abilities.
This is the same situation as the calendar of events. Now that we know that the next World Boss is dark element Moa, players can begin preparations to counterattack in advance.
The identity of the tasks of the Fiesta should not be kept secret from players. This hinders them both in preparation and time to complete the quests. We should know what missions we are getting ourselves into in order to have a chance to claim the rewards. Players should at least be able to click on the quest tabs and see what needs to be done.