Rhongomyniad Morgause
Bloodied Lance That Severs The Land
Rank: B++
Type: Anti-Army
The Holy Lance of King Arthur, used in her final battle against the usurper Mordred. In legend the spear disregarded Mordred's armor as if it was no more than tissue paper before piercing her chest.
As Lancer obviously isn't the spear's proper owner, he normally wouldn't possess it as a Noble Phantasm. However, when he found his mother and buried her after the battle Lancer came upon the lance still lodged in her breast. In a stroke of dark inspiration Lancer took the spear, making it the symbol of his future rebellion. It's an act of poetic justice on Lancer's part, wishing to slay his hated knights by the same spear that stole his mother's life.
That same spear is Lancer's primary Noble Phantasm. A large and overly ornate spear that he can only barely swing, it's only thanks to Lancer's enhanced conditioning as a homunculus that allows him to wield the weapon at all. The true nature of the lance is a "world-anchor" whose true purpose is to hold together the twin sides of the World, reality and illusion, and is regarded in the same light as the Holy Spear that pierced the side of the Messiah in the first century.
However as Lancer is totally ignorant of this, he's unable to call on the spear's true power. Instead, for the true name release, Lancer devises his own technique combining the spear's power with his own
Mana Burst inherited from Mordred. Crying out this Noble Phantasm's true name, Lancer changes massive amounts of his Mana through it. A swirling cone of wind wraps the spear, lit up by flashes of red electricity that arc and crackle violently around it, giving the whole thing a savage and tempestuous appearance. Lancer then draws back his arm in a javelin thrower's stance and hurls the spear at his opponent with all his strength.
As the spear sails through the air it takes the form of a "bloodied javelin" of swirling lightning. By the time it reaches the opponent Lancer's unstable, churning magical power combined with the spear's own nature as a world-anchor ends up inadvertently ripping a hole into the Reverse Side of the World. This localized rift in reality is sewn shut almost as soon as it appears as the Counter Force acts to forcibly correct the anomaly in the World's tapestry.
Even so, the pressure difference between the magic-heavy air of the Reverse Side and that of the modern world creates a vacuum that sucks up all Mana in the path of the spear, essentially deleting it from existence when the rift closes. Put simply this creates an immense implosion of magical power around the spear that ruptures any defense in its way. An "ultimate attack" that can sunder any kind of defense, born from the culmination of Lancer's own abilities and the latent power slumbering within his spear.
As it serves to devour Mana, this attack leaves the landscape momentarily barren of magical energy after invocation. Thus, abilities that draw on Mana from the World to perform (rather than one's innate Od) like most forms of Magecraft will be unusable for a short time. After that the World will pull in more Mana from the surroundings to refill the void. A direct hit on a Servant can plunder the very Mana that comprises their body, leaving devastating wounds that can't be easily healed from.
The consequences of this technique evoke Mordred's own rebellion, which even after Arturia's victory ended up fracturing Britain irrepairably and leaving her successors to rule over a wartorn wasteland. Perhaps it's a final act of spite from Lancer to Mordred's killers, even if he never lived to see it in life. Lancer himself is oblivious to the true reality-bending nature of this attack, as he just calls it a "really big boom".
Lancer invokes this Noble Phantasm after the name of his "grandmother", the fey sorceress Morgause/Morgana.
However, using this technique heavily taxes Lancer's Mana. As he only has a degraded replica of Arturia's draconic core Lancer's body is unable to provide enough Mana for this attack so it ends up leeching on his natural od as well. This incurs a tremendous strain on Lancer's body and can end up killing him if used carelessly. After invoking this ultimate attack Lancer would be greatly exhausted and need a full day of rest to recover. Using it more than once in a row would certainly end his life.
Profana Regis Occidendum
By God Is My Dishonor Avenged
Rank: A
Type: Anti-Unit
A Noble Phantasm crystallizing the curse that avenged Lancer after his death. According to legend King Constantine had cornered Lancer and his brother in a church. Lancer begged the king to spare if not his life, then his brother's, but Constantine ignored his pleas and mercilessly killed both of them. The boy's fresh blood soaked into the holy altar, profaning it and incurring the wrath of God. It was said this detestable act cursed Constantine, insuring his doom when he was later killed by his nephew Aurelius Conanus.
This Noble Phantasm only activates when Lancer is killed in a way deemed "dishonorable", like by ambush or betrayal. Then a heavenly curse befalls his killer, insuring their ruin in every action undertaken. Practically this amounts to reducing the killer's Luck stat to zero and making every Luck check they perform an automatic failure. This effect lasts for the rest of the Grail War and there's no clear way to expiate it, except perhaps by some powerful blessing/exorcism Noble Phantasms.
The best strategy for Lancer would be to brag about this Noble Phantasm's effect to all his opponents, deterring them from using any underhanded tactics against him. However as he finds the idea of hiding behind divine protection to be shameful, Lancer instead conceals this Noble Phantasm's existence from his enemies. He keeps it in reserve as a last spiteful curse to place upon his killer. It may be irrational, but for Lancer, vengeance is far preferable to deterrent.
As it's a curse from God, this Noble Phantasm's effects can be weakened if the killer has a
Divinity Skill, and nullified altogether if it's ranked A or higher.