You can use it to copy a combo piece in your graveyard, effectively avoiding countermagic, or just copy a creature that gets good value for you when it attacks, like Archon of Cruelty
On the NCR side, you get an easy way to recycle your crucial Aristocrats engine pieces
Given payoffs like Runaway Steam-Kin, Storm-Kiln Artist, and Young Pyromancer, you can have a lot of fun with this one
The commander of our Dice Roll Tribal is Vrondiss, Rage of Ancients, a Legendary Dragon Barbarian that whenever we roll one or more dice, we may have it deal 1 damage to itself, triggering its Enrage ability and creating a 5/4 red and green Dragon Spirit creature token with When this creature deals damage, sacrifice it. Vrondiss can be build in several ways, but we have choosen to focus on its Enrage ability and trigger it with rolling dice
You dont even sacrifice the aura tokens at the end of the combat phase, or end of your turn