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"Hmm, miniaturizing the jet propulsion engine works better underwater. Carving wood takes too much time, let's custom-order a simple metal shell instead, but two jet engines are too wasteful—one is enough, the power is already sufficient, there's no need to strengthen it anymore. Let's add an air undead test tube... Might as well not make it in a synthetic form, since undead are especially easy to detect."
Amberser kept making changes to the blueprint, and quickly came up with a new version of the undead troops.
It was the simplest form of streamlined machinery, hardly recognizable as a fish anymore, resembling more of a small torpedo with its own jet propulsion.
Finger-sized, with a miniature magic array as the propulsor, relying solely on minor fin movements for direction control, and the torpedo's head had space to load alchemical bombs or other weapons.
Amberser muttered to himself, "Alchemy bombs are too costly, my air undead are more cost-effective."