It appears Samantha needs to find stems of the summit carnation for the mandrake potion Talissa is making. Talissa sees that there is someone who needs help and who can help us with our mission on the Island of Trade Routes.

As we arrive, Suleiman, the most honorable merchant on Taonga, greets us. His helper has betrayed him, and he needs our assistance!  We need to find the oasis to learn what happened. At the oasis, Samantha encounters only the empty site where Suleiman’s auction is supposed to be held. Suleiman’s helper promised to prepare the site for the auction, but then he just disappeared. Somewhere over the island’s rock walls, the trader hid his caravan – let’s find it!

When the caravan is found, Suleiman notices there’s nowhere for the guests to sit. We need to find some baklava, pillows, and carpets to make the guests comfortable. 
   
You can find the necessary items among the wandering merchants on the Island of Trade Routes, but each trader will ask their own price for them. You will need 2 clay lanterns to purchase 7 baklava, 1 hibiscus tea to obtain 2 carpets, and 3 omelets to get 4 pillows.

Prepare places for the auction guests by tapping on the grassless spots near the auction site.
   
Now that the area is ready for guests, the auction needs some advertising! Samantha will have to make 10 billboards at Suleiman’s location and put them near villages on the island.
   
A billboard requires 2 red pigments, 2 yellow pigments, and 5 reed mats.

Sparkles in the villages indicate where a billboard can be placed.
   
10 billboards will be enough to attract a bunch of guests to the auction. 
Suleiman is excited to see such a big crowd! The auction is a great success. As a token of his gratitude, the trader gives us the stems of the summit carnation that Talissa needs for the potion! Now we can head to the Island of the Ancient Mandrake to find the final component.

You will encounter many sand dunes on the Island of Trade Routes – sift through them, and you might find jewelry boxes to put on your Home Island. Open the boxes to get diamonds, growth elixirs, and gold coins.
   
Make sure not to overlook empty merchant tents in the villages – restoring them will give you a bonus reward.