Need some help.

So I recently found out about a cool site called discord. Once I found out about it I wanted to make a roleplay-ish server, and I realized survivor would be perfect for that. Right now I'm making a discord server to set up an online survivor game, but one problem. I have no idea what to do for challenges. ;-; If you guys have any good ideas please tell me them, or if someone has already done this, maybe send me the discord link. Thanks.