Mystery Crank is a new premium-oriented way of obtaining Units and Items introduced in Metal Slug Attack, even though File:MSD currency MSP.png MSP and free options are available. Its use is walked through during the tutorial at the beginning of the game. Each type of cranks can be spun either 1 or 10 times (with a discount) at a time. File:MSA Daily.png Daily quests offer EXP 80 and File:MSD currency MSP.png 5,000 [as of 1.3.0] for using any crank once.