The Offspring are members of the Otherkind, beings made of pure magic and the original sources of it on Earth.
The Offspring’s first act after being summoned to Earth was to eat the entire crew of a US submarine. Wonder Woman joined the Creature Commandos as they investigated it only to be attacked by The Offspring. Frankenstein sacrificed his body to get the rest of them to safety, but his body is pretty easily stitched back together by S.H.A.D.E.