OK, Q Workshop might call them "Call of Cthulhu Metal Dice", but given they have fanged mouths surrounded by tentacles, I could see them being used in Krarshti gambling dens all over Glorantha...
On Kickstarter now: https://www.kickstarter.com/projects/q-workshop/call-of-cthulhu-metal-dice-set-by-q-workshop-and-c
