An official timeline of events leading up to where we are now in Storm Call would probably be a bit helpful for everyone, including me, so that it can be pieced a bit better.
2011, September - Stella and Luna search for a strange object, which is what Lucile arrived in. Lucile gets startled and casts an explosive curse on Luna that activates once whenever she reached full magical capacity.
December - Minor incident between ice dragons and fire dragons, Arthur injured and unable to breathe fire in dragon form.
2012, July - Major incident between Ender and Johann, several areas flattened, no casualties.
August - Tenosha Klouden goes dark.
2014, February - Clair becomes aware of Luna's curse and drains small amounts each weekly visit. Johann overhears but dismisses it.
Part 1 of 2/3(?), entire event line can't fit