The ability of making, trading or buying (with gold) - guild items. At this time the only way of getting dice or cyclones etc - it thru chance or souls. There should be a gold option in the guild shop or even some way of making them in the guild itself.
Surely an equivalent to the 3 step engineer building for a player being possible in the guild - e.g Small - Stones, Med - Cyclones and Large - Dice.
Just a thought