What if, there was, like normal achievements, clan achievements. It would start off like the normal low achievements, and there would be 3 tiers of each achievement, similar to the way we have now.

The clan castle would hold the gems and experience, and you would collect it when your ready, like your war bonus, but this cannot be stolen. Each level clan castle would hold a specific number of gems and experience, for example;
- Clan castle level 1
Holds 200 experience and 20 gems
- Clan castle level 2
Holds 300 experience and 30 gems
- Clan castle level 3
Holds 500 experience and 40 gems
- Clan castle level 4
Holds 500 experience and 50 gems
- Clan castle level 5
Holds 1000 experience and 100 gems
- Clan castle level 5
Holds 2000 experience and 200 gems


The achievements would start off slow, for example:
Tier 1 - Win 10 clan wars, awarded with 200 experience and 20 gems to every player (or top 10 players)
Tier 2 - Win 50 clan wars, awarded with 400 experience and 40 gems to every player (or top 10 players)
Tier 3 - Win 150 clan wars, awarded with 2000 experience and 80 gems to every player (or top 10 players)

I think this would be a good idea as it would bring players closer together and encourage clans to work together to reach goals. And how about introducing clan wars tournaments, it would work well with this idea, for the first win you would receive a certain number of xp and gems, and so on.

Please leave your feedback on this idea, and tips on how it could be better (I'm sorry if it's ruled out anywhere) haven't seen it anywhere.