Finally got round to making a first version of my previously mentioned idea:
ideabasically DS is a spirit which isn't quite in the 'real' world, so is immaterial but also weak.
Vitalis is a creature full of life which is gained from giving DS life, but therefore it is in 'our world', so no longer immaterial.
Wanting to make Vitalis a bit more interesting, creating a Spark speaks to the aether origins which spark off this creature so full of life!
At the Moment, Vitalis is not thought to be a card you can have separate, but only through evolving DS. It has a cost in case it has rewind cast on it, so then you would draw Vitalis next turn rather then it turning back into DS.
discussionsstats (and cost) of both creatures?
have Vitalis as a separate card as well (like Graboid/Shrieker)?
the create Spark effect - bad/boring/good?
overall idea?
anything else?