To unlock this one you need to equip Clock Lancet, Silver Ring and Gold Ring. Level them all up to max and then evolve them by opening a treasure chest.
The silver Ring buffs you whilst the Gold Ring buffs your enemies so I'd level that up after getting a decent build going.
The Silver and Gold rings become available after unlocking the Yellow Sign:
I did this in the Mad Forest map. The Silver Ring is at the top of the map and the Gold at the bottom so you'll have some running to do (the Wings passive item may be handy for you). Each ring is guarded by a boss so make sure you're ok to kite it around whilst killing it.
You can also use the VIII Mad Groove arcana which will pull all items on the map close to you every two minutes.
If you do this, it's worth getting a build going before grabbing the silver and gold rings so that you can handle the bosses that spawn.