Gehena in korean 3/4

Hello everyone can someone help me and tell me what i need to do? thx a lot

That's only a cash event. If you buy 75$+ in cash, you have a chance to get one gehenna.

Do you guys know how long will be this "event"? It's say: 2015 1 6, so will be until 6 of january/2015? I'm saving my obamas ($) to christmas items