Path of the Hollow King
- Hollow King's Mantle: Projects a whirlpool of tightly packed madra, which can be used to intercept and redirect techniques back at the attacker.
- Hollow King's Spear (or Hollow Spear): A spear made of condensed pure madra designed to stab a hole through madra-based defenses. At higher levels, it conducts willpower and can destroy the souls of lesser artists, and eventually takes on the form of an actual spear rather than just a beam of madra.
- Madra Pulse: An omni-directional pulse of pure madra that floods the area to wipe out or disrupt enemy techniques.
- Madra Bullet: A highly condensed ball or stream of madra enhanced by soulfire, is capable of destroying techniques, damaging channels, and shattering cores.
- Hollow Armor (or Hollow King's Armor): Projects a layer of pure madra over the user's body, providing strong protection against all madra-based attacks, which are diluted by passing through pure madra, though the technique is not particularly good at Enforcing the body's physical strength. At a sufficiently high level, the madra takes the shape of an actual suit of armor and the protection becomes much more powerful.
- The Crown of the Hollow King (or Hollow King's Crown): Involves Forging stars of pure madra meant to damage the spirit. It is Eithan's most savage spiritual attack.
Since there is no such thing as pure aura, this Path does not have any Ruler techniques.
- Heaven and Earth Purification Wheel: This cycling technique focuses exclusively on helping the practitioner build up madra capacity over long periods of time, to the point that it is useless for actually replenishing madra. Without this technique Eithan's Path would be impossible, as almost all of his techniques require copious amounts of power to function as they do.
- Raindrop Iron body (also see Iron body): Although not necessarily integral to the Path, it has incredible synergy with the Arelius bloodline senses. The Raindrop body grants incredible reaction speed; as Eithan phrases it, he was born with "eyes faster than his hands", and this body allows him to take advantage of his senses.
- Arelius Bloodline Abilities, and see House Arelius
- While not directly coming from his Path, Eithan's bloodline senses are heavily integrated into his Path and some of his powers are designed around it.
Prior to Wintersteel
Until Wintersteel, Eithan's Path was one of the many mysteries of the series. With it we had seen Eithan regularly do what other Underlords considered impossible, and not just by the meager standards of the Blackflame Empire. That being said, Eithan was also loath to reveal the strength of his techniques, in fact, other than his Enforcer technique Hollow Armor, and general bursts of power, Eithan almost never used his techniques at all. It was only in a rare confrontation with Longhook where Eithan believed himself to be unobserved that he even used other techniques.