Complex sentence: This explains his assertion that destroying "The Ark" wouldn't affect him, because he and the council have different origins, although it is never in fact stated in the show that Tarantulas is descended from Unicron.
Split into simpler sentences: This explains his assertion that destroying "The Ark" wouldn't affect him, because he and the council have different origins. Although, it is never stated in the show that Tarantulas is descended from Unicron.