Every week on boucheetah there could be a quest. Like collect a certain amount of items, or 1 item that you have to get to finish the quest. The Quest could be like " Get 5 +4 Bladess bodys today" Or " Win 10 pvp matches today". You could have 1 quest per week, or multiple tasks ( 1 quest per day) to obtain a prize at the end of the week.
EDIT: You could also do months. do 1 quest a week until the month is over and at the end of the month a prize
Feel free to add stuff to this idea. NO PRIZES ARE GIGAS