These are two bosses of the fjordur map there they drop special rocks that can get you to the dragon arena its in the yellow portal from the portal room after defeating these the dragon and all the other bosses you can fight the final boss and earn a fenrir ps dragon portal is in a cave near the artic
Hati and Sköll are world bosses that you need to kill before the actual bosses. You fight these bosses at the same time and to summon these world bosses you need 30 runes and to get those runes you need to kill alpha creatures. You fight these world bosses in the open so bring strong tames to fight it and you get two specific runes from killing these bosses that are used to fight the dragon and with the dragon head you can fight the final boss.
This is a world boss that costs 30 runestones to fight. To fight it you go to asgard and go to the boss spawn terminal they will spawn in the open world so you can use any dino. If you get to far from the place they spawn they will disappear and reappear at their spawn with max health. The red and yellow wolf has less health and uses a astral projection that lights your dino on fire the purple wolf summons minions and has around 250k hp
Fenrisulfr is the boss the final boss of Fjordur, it can be summoned at any Obelisk with the Broodmother, Megapithecus, and Dragon Trophies. Defeating it will reward you with a Fenrir. And on hard it will give you Mjolnir Skin. Up if Helpful!!!
I killed it just get a snow owl max level and make wild max level 600 then get the frogmac kibble station fmk mod them use the fmk grow up paste to get max imprinting on the snow owl then try not to die :)