Loki is too strong. I thought the legendary devil fruit could be Surtr, but now it seems to be Nidhogg, if Oda makes it cool then fine by me.
Hajrudin defeated Machvise's 10,000 ton technique. By the look of the size of Ragnir, it could be weighted around 100,000 ton as much as an aircraft carrier. It's not accurate but there is a drastic difference between their strengths.
Garling never went to get his child back? or maybe he is CoCless. If he really is CoCless, then Shanks and Shamrock must be genetic jackpot. And Shanks manage to achieved CoC level as close as Joyboy has nothing to do with his father. That makes Shanks capturing Loki a real feat. Probably after what he witnessed from the Ragnir's DF, he went around the world searching for Gryphon and slap it into his sword, to become stronger. This also completes the lore of the squirrel stirring shits between Nidhogg and wise-Eagle.
Just one strike and Harald is gone, such a sad ending to Harald's life.
Zoan DF can stay forever inside an object as long as the object didn't break. It seems like this is the correct way to utilize them.
The squirrel also doesn't seems like it's awaken like the Shamrock's Cerberus, maybe Cerberus is given by Imu.