I bought both dice packs (supposedly the correct ones, I hope) about December 7th, and still waiting for them to arrive. I wrote them at their internet site this wednesday, but no response at the moment.
Another possibility would be to connect those showy effect with the level of spirit magic. Low level spells could be almost undetectable (1-2 levels?), and higher ones could be quite spectacular.
I think I’m liking this idea.