Well my idea was that, for instance, after building the academy, one could use it to combine relics like you combine gems in other games. For instance 4 x the same relic combines to create a stronger relic, then 4 x that relic creates an even stronger one. Maybe one could combine relics of different types to achieve different effects, so people could choose to concentrate on one aspect, say culture, or try to balance buffs of all kinds. Possibly one could also use extra rune shards combined with relics to enhance AW or for some other purpose. I assume people will have tons of them knocking around uselessly soon
Theses forged relics could be applied to supplies production, armies, culture or even provide a % or fixed amount extra population. I personally believe this would be a more useful use of the space it takes up than having it create temporary spells. However, I equally believe that the devs of this game will not be changing the system and that they are not particularly interested in our ideas if at all. I suspect the magic academy will become essential to game-play in future and that the game will be changed to make it necessary, the fact it costs gems to upgrade makes me feel it's probably not going to be a a good way
Using boosted relics for AW also suggests there will be a shift in the current situation of people trying to produce as much boosted goods as possible. I feel like boosted relics will become less important and we'll be using relics simply for spells in future.