1. Go to your house/castle
2. Click the House Customization button in the right hand corner
3. Click buy new furniture
4. Click Living
5. Buy the metal chest
6. Place it somewhere
7. Go back into Sim time
8. Click the box
9. It will ask you to place something in it click that option
10. All done.
It will now ask you to "Recruit one legend for your guild." That is where I am stuck. I have gathered from the internet the guy's name is Arthur Veritas. After checking EVERYONE in my kingdom 3 times I can not find this guy!!! So if you find out where he is exactly PLEASE let me know. Thanks so much!!