Trickster Spontaneity Trait Math

Is the description for this supposed to be a kind of 4th wall meta-trickster trolly/joke thing? So many perks give you the a+b=c of their effect in clear and useful detail, and Spontaneity says “At random times during your creature’s turns, they have a chance to Cast one of their Ethereal Spell Gems.” As I’m currently using Trickster to sub for Cabalist while the bugs get worked out, this one sometimes gives a very similar flavor to Cabalist and sometimes not…

I would appreciate it if anyone who datamined/developed the game could clarify this for me a little.