First sorry for my bad English 
I think it would be a good idea to introduce more « macro spell ».
Exemple :
A spell to reveal the whole map.
A spell that improve diplomacy lvl with other civilisations.
A spell that improve certain building or type of area, like drood's spell for food for exemple.
A spell to make earthquake (vs cities ?), tsunami, tordano
Spell to steal a technologie / to make a civilisation « forget » a technologie.
Etc
Why not give a cost to this kind of spell and a counter to the player.
Perhaps give to each civilisation different affinities with type of spell (chaos, fire etc)
According to the affinities, give them a regeneration rate witch regenerate the counter.
What do you think about it ?
Another idea I have is to make the state religion a condition / a restriction for certain research / unit / spell.
Indeed, if your civilisation/Religion is Bad, you cant make paladin, so you sould'nt be able to make the corresponding research.
(so sorry for my english
)

I think it would be a good idea to introduce more « macro spell ».
Exemple :
A spell to reveal the whole map.
A spell that improve diplomacy lvl with other civilisations.
A spell that improve certain building or type of area, like drood's spell for food for exemple.
A spell to make earthquake (vs cities ?), tsunami, tordano
Spell to steal a technologie / to make a civilisation « forget » a technologie.
Etc
Why not give a cost to this kind of spell and a counter to the player.
Perhaps give to each civilisation different affinities with type of spell (chaos, fire etc)
According to the affinities, give them a regeneration rate witch regenerate the counter.
What do you think about it ?
Another idea I have is to make the state religion a condition / a restriction for certain research / unit / spell.
Indeed, if your civilisation/Religion is Bad, you cant make paladin, so you sould'nt be able to make the corresponding research.
(so sorry for my english
