We get one IMU v. Luffy skirmish.
Luffy is the underdog, but he manages a few times to summon a type of haki that makes IMU go all worried "!!!!"
Events all around them escalate, with the nightmares and the raging fires.
IMU keeps having the upperhand, when Brook & the lesser SHs manage to wake Gunko up.
IMU is sent back to MJ; the rest of the HK, by now defeated, are also tp'd back through the Abyss.
Gunko, who had done the summoning herself, is left on Elbaf.
Saul takes care of her.
Elbaf is left in a desolate state. The giants vow to rebuild. Loki will help them, then he'll set out for revenge.
Luffy tells him he counts on Loki's help in the future.
Arc ends with Gaban spilling the beans on The Man Marked By Flames, the whereabouts of the poneglyphs, and a little warning to Nami as to what she should expect, weather-wise, on their incoming voyage to Lodestar.