Grandline Shinsekai: Episode 18

The Summit is the eighteenth episode of Grandline Shinsekai.

Plot
The Red Wing Pirates prematurely arrive at the Summit's location, according to the map, the summit isn't where they're supposed to be currently. Romeo writes this off as the maps mistake and leads the group inside the building. They are all instantly seperated and locked into different rooms, all confronted by one of Macbeth's six demon kings. In truth this was all a trap set up by none other then Macbeth himself.

Meanwhile at the true site of the summit, the nobles gather to discuss the current chaotic state of their union. Several issues come up, including the threat of civil war, and a bank of secret magical weapons hidden beneath Alabasta's capital, Aluburna. When this topic surfaces, Macbeth reveals himself.

Back at the mirage site, Wonder battles with Iblis, a giant cat made of blue flames. At first, Wonder is overwhelmed by the power of the so called Demon King. But eventually he is able to bait Iblis into swallowing him. Not unlike what he did to the sand shark previously, he destroys Iblis' innards, causing it to explode and leave Wonder victorious in their bout.