Very simple, you name your invented lost technology and say what it does.

Almighty crown.

For those who wants instant governing power in all kind of places at the cost of their intelligence.

Mind boomerang.

Throw it at the thing you currently are thinking about. Wild throws are often bound to happen, especially if you think about yourself. At least, it will always return to your hand.

Does this thread allow all kind of lost technologies? From funny plot devices to game related stuffs?
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Chrono Fusion Reactor.

Lost Chrono String processors. Draws full energy from Chrono Strings and converts it into a more efficient energy form. Used to power most autonomous guard satellites.

Yes, anything you can think of.

As the Transvaal portrait seems unique...

???? (Still thinking about name) Cannon.

Shields of the EDEN planetary systems, working by placing orbital energy cannons that automatically intercept potentially harmful objects having contact with the outmost atmospheres of the corresponding planets. Their orbit could be seen as the "rings" around the planets. Malfunctioned and self-destructs when Chrono Quake Bomb explodes (In the First Great Valfask war), that destroys main control panels of the cannons that is placed on the poles of the corresponding planets.

all-seeing eye:
You can look in any direction from any spot in the universe, however, while using, it takes the place of your regular vision. (You cannot HEAR from any spot in the universe though).

all hearing ear:

..................what?, did you expect anything original from me?

Somethingoruther. It does shit.

The sword of world ripping.
Seperating time space.

The invertinator. Activating it causes whatever it touches to invert colors...activating the second button causes everthing in ten mile radius to invert...activating the third...and the universe does so...the fourth however, makes touching objects PHYSICALLY invert...5th, ten mile radius inside out mode...6th, the universe PHYSICALLY inverts...which will probably kill all life as we know it...

dimensional creator:

allows you to create other dimensions at will.

Mindsimilator: allows you to scan another's mind, and absorb all the data...warning: if you don't know what you are doing, you might actually REMOVE the data, and put it in your mind, rather than simply copying it...and you might get mpd...by copying their personality as well...

An egam staff.

Allows you to do magic abilities, or so it seems. (Actually, it's an illusion)

They already had a fake magic staff...so its only SLIGHTLY original...

no, the staff took a photo of people when they attempt to use it.

I don't remember much from this episode, but the staff did do nothing (not even an illusion) and they tried all 5 together, i think. (Been almost 2-3 years)

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No, when they tried all five together, it printed a photo of them doing so...from the perspective of the viewers of the show...(makes about as much sense as flashbacks being viewed from the third person...)

( Interesting, i didn't remember this. Well, this staff is worse than the one from GA. When you thought you've beaten an enemy with a fireball but in fact it's your own illusion from the staff. Which means that enemy could sneak easily against you.)

Yeah, the military was too embarassed to test it, so they gave it to them with the hopes they would instead...which they did...and then the military took the picture for research...they then got in the emblem frames and started shooting at them...and someone commented that this is probably how all those wars that were fought over it got started...

(Heh, if we ever make a roleplay game in GA universe, i might try for magic, which i wouldn't have at beginning. With balance of flaws and advantages, i would be eligible to learn it. Creation magic to be exact.)

I usually just upgrade everything to max ultimately...(and in the meanwhile, keep everything equally buffed...)...I like maxing out, its fun...

(Upgrade what, exactly?)