I have a suggestion about this dungeon, base on my experience I'm having a hard time entering this summon room not just me but other players too. So I would like to suggest something for all the players to experience this dungeon without affecting the price of this card.
I want to suggest that this server gives every player, (like our voting system "WITH IP" to avoid using different characters) one day pass to this dungeon and reset the time for 24hours and reduce the drop rate of thana card to 0.05% it is better than the whole week we could not enter this dungeon.
OR...
they should just let us wait for 2 hours even we are out of the game.