Greeting
The following is a suggestion to what can be added to the guild hall later.
For future upgrades how about the… Wait for dramatic effect… the Colosseum.. Arena upgrade.
The Colosseum allows guilds to " Capture"/unlock world creatures to add to the arena like arena decorations.
They move react and attack as normal.
Note there creatures and monsters will drop no loot or grant no EXP.
Think 2 gladiators fighting with a lion also in the arena with them.
The madness, the awesomeness the brutality… teria’s circus maximus!!!