Barrel Dice by Mindlessdrone link
There is an alternative dice type, the barrel dice which look very pretty and the 4 sided version is more like a shard or a splinter and having a handful of them could be quite fun to cascade onto the table. The colour will be the only face that presents 'upwards' and that is pretty nice. There may be more problems with the dice landing on each other with this method (test this perhaps). Maybe I should find the most 'thematic' choice between the two???
The other special dice on my mind at the moment is the 13th Age escalation die. This special die tracks combat rounds with things ramping up through the fight from 0 to 6. Perhaps a special 7 sides die would be perfect, but 7 sided dice are a strange beast (very odd shapes). I guess we can just use a big fancy D6 as most people do, though another alternative would be a big ol' D8 which has the 0 to 6 numbers and one spare face for something else like the 13th Age logo perhaps...
Photocube escalation die link