I was going to post this straight to the wiki under the “Loose Mechanics” heading Leonard set up, but then I was like, no. Blog for throughput, wiki for retention. If it goes to the wiki, it’s because it got discussed here first.
So! Protodice.
Pipped dice are protodice; numbered dice are developed dice. At certain times, you may roll a pipped (six-sided) die and multiply the result by two. It’s then exchanged for a die with that number of sides (d2, d4, d6, d8, d10 or d12, where “d2″ just means “a coin”). At certain other times, you may exchange a developed die or dice showing a combined 8 or more for a new protodie.