I don't know why this card doesn't work with Parasite Paracide since apparently, the OCG ruling for Parasite Paracide says Parasite Paracide is special summoned from the hand.....
My only assumption, is that Parasite Paracide's SS effect actually activates during a very specific tiny window when the card is drawn but not added to the hand yet. Hence why this card doesn't synergize with it, since technically, Parasite Paracide wasn't special summoned from your opponent's hand.
Maybe what the OCG ruling meant with "hand", is your drawing hand, not the cards in your other hand.
This card is a killer tribute with djinn and super soldier synthesis. Really overlooked. It has been my go to tribute for him until they put in that level 7 Gaia card that is a light monster. That will be a while cuz it's super op.