Three types of glimmers exist: Storyborn characters featured in the original Disney sources (movies, comics, etc)
Each player usually spends around 10 minutes per match.
If you are facing a deck that has those types of cards as key build-arounds, you can just completely shut them down
A second set is already planned for this November, with no details on what it will introduce to the game - beyond more cards
Every time Mulan quests, which also gives two lore, you can look at the top four cards of the deck and, if there is a Princess character there, you can put it in your hand
Kefka and Sephiroth are all-timer villains from the Final Fantasy line-up, while Vivi, Y'shtola, and Cloud are fan-favorite protagonists