Sorcerer's Mythic Lid GST3d (Best for Painting)
Arsmoriendi's Mimic Dice Box is a.... safe? space for your most precious math rocks. There is nothing suspicious happening here. It could even be used a fun terrain piece.
The Ars Moriendi Mythic Dice Boxes will fit any Mythic Lid or Dice Guardian. So be sure to purchase your lid too.