Age of Wonders:Shadow Magic : New Interview
One of the developers from AgeofWonders series provides an interview. Hopefully the Stardock developers will take the 2 minutes to read his interview for why this fantasy TBS was so successful. I'm not saying this game was perfect I could easily list weak points, however the game has many strong points... and spells which strike an entire battlefield are not available for an early game summon as what Elemental originally provided.
http://www.rockpapershotgun.com/2010/09/24/age-of-wonders-re-release-also-interview/