Blessed Construction hotkey partially works on all civs.
See the effects below:
Tower, Castle, Dock - Doubles the number of arrows, -33% build time
Tower, Castle, Dock - Doubles the number of arrows
All other gods - Doubles the number of arrows
Effect disappears after Kronos’ Time Shift.
You can double the number of your arrows, even if you buy Blessed Construction for 1wood/1gold.
The command of Blessed construction is uiSpeedUpConstruction
However it increases the construction speed only for Fu Xi.