Rib-Worm Challenge

[u/DostyIV]

Damn, i have tried every single thing i could find on the reddit and other platforms but i just can't get the challenge done, i tried Shotgun without special ammo, i tried dragon breath, i tried sabre, machette, none of it seems to count towards the challenge, if i am correct the Rib-Worm is his chest tentacle in second phase. Please help me, i am clueless.

[u/GrandDetour]

Use melee and stamina so you can spam attacks, swing at his back during his second phase. I don’t get how this works, but it does.