Nethelio lacks nearly skill when it comes to fighting directly with weapons or her body in comparison to her fellow Antillambrae, which combined with her weak physical form in comparison to her fellows means that she mostly fights using magic and her Curse manipulation, which in her case takes the form of being able to control and shape the Black Mud that the Antillambrae use to heal themselves, store Curses, and even reproduce, which she can use in a variety of ways, especially as it grows and expands when it absorbs curses. her most common use of it is to create limbs emerging from the slick puddle, which follows her wherever she goes - these grasping limbs will strike at her enemies as well as being able to grab and constrict people, and she can have many of them, or perhaps two reasonably large ones instead. In addition to these limbs, sh often uses it to release projectile blasts at her enemies, create walls to block attacks, create massive spikes to impale her enemies, and many other things. When her puddle grows to truly massive sizes, her weakness instead changes into incredible power, being able to make thousands of limbs, summon colossal walls, release projectiles that can destroy buildings, and even forcibly hijack a colossal, steampunk mech later in the story by running tendrils through its workings to effectively control it like a puppet. However, this level of strength can only be gathered in either massive states of unrest such as a warzone due to the curse output, or her home inside Babel. In addition to her Curse manipulation, she is extremely skilled with magic to compensate for her lack of physical power, and commonly unleashes waves of freezing ice, fireballs, lighting blasts, shadowy spectres, and dark purple energy blasts to add to her power, in addition to often using levitation to float around all cool-looking with her arms crosses while her arms and magic do the fighting, only rarely gesturing in order to cast spells which require such things. When forced into a direct physical confrontation, she will often die quickly, and Blessings are even more effective against her than they are the other Antillambrae due to how they wither away the Black Mud she uses. However, she is quite skilled with moving her core to avoid attacks, so it often takes total destruction of her body to kill her.