Dragon Tooth Warriors (竜牙兵, Ryūga-hei?) are familiars manufactured and bound by dragons' fangs, used by Medea and Semiramis through the Item Construction skill. Acting more like golems than automatons, they are skeleton rank-and-file disposable soldiers meant to be readily expendable in battle. They are brought forth by planting the dragon teeth in the ground, an inexpensive act allowing for a near-limitless amount to be created. Bestowed with the magical energy of the dragon race and granted knowledge from the earth, they are able to act as an army to slow their enemies. Illyasviel von Einzbern comments that they are "cheap", and Saber mentions their low quality, but that is easily overlooked due their amount. Powerless against homunculi and golems built specifically for battle, together they are legion, able to overwhelm others through sheer number.
They are very strong, said to be able to be very troublesome for a "group of level five adventurers." Shirou Emiya is able to easily destroy them in one-on-one combat with a reinforced wooden sword, and Servants can easily wipe them out without trouble. Even a group of five hundred poses no immediate threat to a Servant, but it can be called foolhardy to rush into a group of them without a plan. Some Servants can easily destroy hundreds at once with their Noble Phantasms, but it does not put any noticeable strain on the large numbers of the forces. While Saber alone can easily destroy one hundred without issue, enough so that the scattered pieces of bones make it look like there is a snowstorm, their constant replenishing numbers are able to keep her busy and have her contemplate using Excalibur to quickly finish them off. Medea can keep replenishing them as necessary to easily surround a stronghold, while Semiramis can easily produce an army of three thousand in short order, only with the ability of the Hanging Gardens of Babylon enhancing her, for a large battle.
Medea can create at least three types, and Semiramis shows the ability to modify them in functionality. While mindless, they show the ability to be "awed" and left motionless by nearby Servants clashing. Medea's soldiers use a variety of different weapons wielded with smooth, mechanical movements that provide wasteless, accurate attacks. The attacks, while accurate, are not refined and do not instil a sense of fear like a true seasoned opponent, moving in loose movements and attacking in the same way. They charge no matter how much they are destroyed, continually destroying the area around them with each attack as they try to slay their targets. Semiramis' special modified flying soldiers, Dragon Wing Warriors (竜翼兵, Ryūyoku-hei?), have the upper-halves of regular soldiers and lower halves of harpies with bird-like features, claws sharper than metal, and wings sprouting from their backs. As harpies are normally unsuitable as soldiers, she has fused them with the Dragon Tooth Warriors, producing "very thin and ugly-looking soldiers" unbefitting of their "dragon" name.
 Fate/side material - Encyclopedia: Dragon Tooth Warrior [Magecraft], p.077 [T]
Dragon Tooth Warrior [Magecraft]
Familiars made from dragon teeth.
The teeth are planted in the ground, where they become disposable soldiers imbued with the magical energy of dragons and knowledge from the earth.
Going by sprites it seems that there are three types, and they're all lovely.
A nostalgic existence for those experienced with tabletop role-playing games.
They're actually very strong, and if a group of level five adventurers picks a fight with them they're in for a rude awakening.
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