Go first dice are cool but I don't think they are non-transitive. In particular they claim that each ordering is equally likely, and for any pair of players (Jack and Jill, say) we can observe that across all orderings we should find Jack preceding Jill exactly half the time. This would mean that no pair of dice should exhibit the kind of edge that exhibits non-transitivity in non-transitive dice.

Sorry, two different lines of thought.

The first was the non-transitive Grime dice, the second was the board game/Go First dice.

My last comment was only in regards to the second set of dice, that I thought they asked about.