The thing uses electricity based tech instead of magic essence, had obvious cyborg parts, went from a scrub easily defeated by some mere magic attacks to something with immense resistance to both magic and swords, and acts irrationally unless it obeys prior instructions.
I'll call it, it is obviously manmade, and the research has been progressing since that first time. Seems the first time was a field-test, the creator found out that magic exists, magic immunity was included (would have been there from the start if they knew about magic), and this is the next field-test.