My GB upgrade idea that should be in game
New button on PC Great building (will be as show picture)
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That button will send player to list of great buildings but with new things
1, slots
player will get at start 5 slots (or more I thing 4 will be enough) and can buy next per 2000 diamonds (+500 cost in all buying) limit of slots will be same as great building in game (now 48)
player can place GB to slot outside his city (all GB will move to inventory) to get his bonus (for example I draw some squares otside my city where it can be Or it can be on new island or in provincies But it should be 48 and few for free other cost diamonds)
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For example player unlock (same way as now) ARC and place them he have for example SoZ (50% boost) terracota army (100% boost) Alcatratarz (40000 happiens + 200 units) and Arctic orangery (25,6% critical boost and 100 FP per 24H) and want place ARC he have only 4 slots and place ARC on slot with SoZ and get his boost but lose boost from SoZ. SoZ will be in invontery with all FP in it and same level stored.
2. upgrade for boost
all great building will have upgraded boosts for example alcatraz level 60 old 58 units new 120 units. But still there will be limit now by maximum level that can be 300 (higest I saw about level 250 GB) Some boost won´t have limit on level 300 (Like ARC) that can be same but Guild goods can be upgraded.
3. Unlocking great building
still same research still same questline new mechanic
bronze tier need only blueprint set
silver tier need silver blueprints and little amout of goods from era of Great building
gold tier need gold blueprints and more goods from era of great building
3.1. new blueprints
new silver and golds blueprints can be get in most hard quest (random) like quest that saying you have to have X people (like quest have 1997 people)
gold blueprint and silver blueprints can be make by new building GB rafinery (Outside city or in GB menu). that need new resources GB scrolls.
GB scrolls can be obtained in Great buildings (helping other players).
For example ARC level 123 to 124 1st place reward 1345 GB scrolls. One
random silver blueprint can need 200 GB scrolls and
random gold blueprint can need 500 GB scroll
3.2. Silver and gold blueprint
Player can choose age for GB bluprint
for example If player choose Space Age Mars player can get blueprint to Star gazer or Project Virgo
3.3. normal blueprints
Same as now
4. Why is this good
1, cities will have space for future event buildings or can make goods for great buildings
2, more startegies
3, better boost = happy players
4, More space for new great buidlings (I want see in FoE white house or Pisa tower or .................)
5, Player will have reason to build some great buildings
I hope you like the idea