This was suggested as an extension of the
long mode. In other words the maximum Tower and Wall values would be higher as well as starting values (this would cause a longer game).
The actual Deity game mode suggestion is as follows:
For each deck you will choose a Deity (from some available set of Deities). In game you will need to do certain thing to satisfy your Deity, for example raise your magic or do damage to your own tower or attack your opponent (this would depend on the Deity you chose). After certain amount you would satisfy the Deity and would gain permanent bonus, which you would receive each round (for example, +2 Tower, or +10 Recruits). The bonus would depend on the Deity. The more difficult were the things you needed to do to satisfy the Deity, the better bonus would you get.
There can be variations: some Deities would have small continuous effects, others can have one time effect, which can be achieved multiple times.
All new game modes are currently on hold, because we don't have enough players, so this topic is not so hot, but it doesn't hurt to discuss it ;-)