Pounderock's Boss Base

is a very rare drop available for looting from Pounderock the Staid boss. Right-click it>"use". After that go to inventory>character>customize>peg base decor: open inventory, select "character" drop-down menu, select "customize" from the drop-down menu, select "peg base decor" from the menu that appears, choose a peg base and hit "save". Enjoy!