I like the idea of throwing out dice into the physical 3D environment to roll for damage. I also think that being able to pick up additional dice works really well when combined with this mechanic, because I had to think about whether I should burst down an enemy or spread my damage around to other enemies/gates with my attacks. The long delay between attacking and recovering the die creates an interesting decision about what to attack without some of the annoyances that a traditional stamina system has.