Engulf
Nu Udra raises most of its form while spreading out widely and attempting to slam the ground with its tentacles and body. Thankfully, this attack gives you a lot of time to not be under it, so use that to your advantage and get out while you can. Sticking around is not advised!
Quad-Tentacle Pincer Attack
Nu Udra winds up its pinning attack by splaying out four of its tentacles and locking on to a hunter, slamming all of them at one focal point. If this attack connects the hunter will be pinned and should use slinger ammo to attempt to break free. If not, your goose is, quite literally, cooked.
Tentacle Strikes
Tentacle Strikes w/ Bombs + Bomb Fling
Mostly focused on ranged weapon users or shy melee, Nu Udra does have ranged attacks while fire-empowered. It will fling bombs that explode on impact with the ground or a hunter, usually in a quick sequence. These attacks can cause Fireblight so be ready with your
Nulberry.
Flamethrower
The flamethrower attack is one of Nu Udra’s signature moves. It will back up slightly to reveal an oil cannon from its body. That’s when hunters should immediately clear the area.
Nu Udra will let loose the cannon on the ground and ignite, creating a torrent of flames in a large cone. Evading to the side once you see the cannon is key to avoiding this attack in time. The flamethrower, unsurprisingly, deals a huge amount of damage and causes Fireblight.
Spin Attack
Nu Udra will twist itself into a corkscrew and unravel quickly, hitting all hunters in the area. Once you notice the initial twisting that’s your sign to get out of immediate melee range.
Mouth Lash
This is a relatively uncommon attack, usually occurring if a hunter stays near Nu Udra’s “mouth” area for too long. One or both of the mouth tentacles will strike at the player rather snappily. This attack doesn’t do too much damage but can be very disruptive to hunters who are consistently aiming for the head.
Raining Mortars
Perhaps its most devastating attack, Nu Udra will let out a scream and proceed to hurl bombs all over the battlefield while spinning. Getting caught in this will hurt a ton and cause Fireblight.
The best tell of this attack is Nu Udra’s scream and the animation of writhing in place which makes it look like it's “charging up” something fierce. One small upside to this attack, however, is that Nu Udra will lose its fire empowerment once the attack concludes.