Plaid Hat Games is hosting the first official Summoner Wars iOS Tournament! See here for details about it.
In honor of this tournament, the price for the Everything Bundle is reduced to $4.99 for this week only, until Friday, October 5, 2012.
The basic Summoner Wars app is free and includes 1 faction. Each faction after that costs $0.99, and the first Everything Bundle, which includes all 9 faction packs currently available, normally costs $7.99. As the new article linked above says, "Even if you own the app already, it's the perfect time to introduce it or gift it to a friend."