Well, I think it is time treasure hunting becomes a more reliable and used way for finding gold. So I have thought of an ENTIRE list of voodoo that would help with treasure hunting. I would love suggestions on concepts I have missed. Since there are so many voodoo cards, I will not go into a vast amount of description, but instead the bare essences of each voodoo card.
Background; 9 are at treasure hunting for any port, and there are a ton of of options on how to raise findings, but essentially the entire process is based on investing turns.
Adventuring Port (Common) - Increase 1 slot's exploration by 15%. Only affects active ports with the castor's warehouses in them.
Extra Shovel (Common) - Add 10 turns to preparation for a treasure hunt.
X Marks the Spot (Common) - Take off 10 turns from a player's invested turns on their treasure. 100% undercover.
NPC Royalty (Common) - NPC max is increased an additional 1 million per use.
Port's Plunder (Common) - Increase Port Max by an additional 5 million per use.
Crew on Opium (Common) - Success chance of digging up treasure goes up 15% percent for the next dig.
Friendly Locals (Uncommon) - For the next 24 hours, asking port locals reaps 2x the rewards than of usual.
Idiotic Crew (Common) - For the next 24 hours, the targeted player has 25% removed from his success chance with treasure hunting.
These are just a ton of ideas I thought of, I would be happy to improvise them.