Quadruple Giga


 * “My sword swings through the air, with me barely managing to hold on. Flames and spouts of water shoot off my sword, as the wind tosses it around and the earth makes it almost too heavy to hold. Rather than balancing all four spirits, it’s almost like it’s a tug of war with them pulling in every direction at once. As I swing my sword down... The crazy power pulling my sword from every direction goes shooting straight into the ground! The ground splits in two with flames raging around the fissure, and cold gusts of wind blowing around the area. All four powers combined for a moment, and exploded in overwhelming power... I can’t even see the bottom of the split in the earth...” – Luka


 * “It’s an ultimate attack that uses all four spirits at once. First, point your sword toward the sky and summon the power of wind into your blade. Next... Put the power of the earth into your blade at the same time. Of course, without letting the power of wind dissipate. Next is water. Like the Earth and Wind, mix them together in your sword. ...Next, the power of fire. Concentrate all four elements in your sword. Now slash with your sword. The power of this skill is amplified by each spirit imbued in it. But if all four were at a power of ten, it wouldn’t be ten times four for forty... It would be ten to the fourth power for 10,000... This is the ultimate skill, Quadruple Giga. The skill takes a while to pull off. To get all four elements into your sword, it will take four turns. If you get hit in the meantime... Your concentration will fail, and so will the skill. One more issue... When you start the skill, any spirits you have summoned will vanish.” – Alice


 * “It’s a truly disgusting tale among monsters. The Hero Heinrich defeated Alipheese the Eighth with this skill. So that we would never experience a humiliating defeat from it again, it has been handed down among Monster Lords since Alipheese the Eighth's death. Ironically enough... It was never passed down among the human side, so it would have been safer to have let it fade into obscurity altogether. I’m entrusting it to you. Make sure you lead the world to peace using it...” – Alice

Quadruple Giga is Luka’s most powerful skill, taught to him before reaching the Monster Lord’s Castle on the night of his final camp by Alice. It is the second to last technique that he learns hitherto (Chapter 1 and 2). Using the combined power of the Four Spirits, it was the famed skill that Heinrich used to defeat Black Alice; Alice XVI only taught it to Luka so he could end her life.

It deals anywhere from 40,000–50,000 HP worth of damage, enough to finish off any opponent in one hit. The technique also only costs 1 SP, allowing it to be activated virtually at any time.

However, it has numerous drawbacks which make the skill nearly unusable:
 * 1) It takes four turns to prepare.
 * 2) If Luka is hit during any of these four turns of which it takes to prepare Quadruple Giga, the attack will be canceled.
 * 3) All four Spirits are deactivated upon use.

Due to these flaws, Luka can only use the attack against four enemies in Chapter 2 of Monster Girl Quest:


 * Imp: Imp does not know what’s going on and thus can be attacked with Quadruple Giga. If defeated with this technique, a defeat message saying “even her screams were sealed” will be shown across the screen. Using Quadruple Giga against the Imp is an overkill, and is there solely for the sake of humor, as well as video game cruelty potential.
 * Tamamo (2): After using her Moonlight Cannon skill, Tamamo is exhausted and cannot continue the battle. Quadruple Giga can be used at this point.
 * Granberia (4): She requests this skill be used in the final part of the battle. She will wait for Luka to prepare the attack, and she declares Luka's victory over her after this attack connects.
 * Alice (2): After Alice’s HP goes below 500 hp (499 is enough) and she requests Luka to finish her, this attack can be used to finish her off. This leads to a little extra dialogue which includes Alice lamenting over Black Alice’s defeat by Heinrich.

Trivia

 * This skill is the ultimate proof of mastery over the 4 spirits. Its concept and that of the four spirits is closely based on Fūrinkazan, a concept from Sun Tzu’s Art of War.