You'll need to make an energy drink, potato chips, and secure "toilet paper".
For the energy drink: the bottle is supplied in the hatch for the Oracle's offering, the water is from a trough in the square where the trial is held, add purple coloring from snails found near the Mary, and sugar from a sack found in the lower hold of the Mary.
For the potato chips: use the potatoes found in the square where the trial is held (you get them from a potato plant), slice them thin with a knife found on the main deck of the Mary, cook them in a pan found on the jetty outside the Mary (it's nearly at the town entrance (Critter boiled salt water in it earlier in the game), and use oil/grease found on the main deck of the Mary. Combine the thin sliced potatoes in the pan with oil and cook them in the stove under-deck on the Mary. When they are done (they'll just appear in your inventory ... you won't have to retrieve them), add salt.
For the toilet paper, use Nate's lucky scarf found on the main deck of the Mary.
Put all items (one at a time) in the hatch below the Oracle's request at its building.