Well, the Straddler is like a Strider but it isn't amicable, has those horn things on its head and it shoots Stradpoles at players. Like the strider, it can walk on lava, but it doesn't change color. Stradpoles are like tadpoles, they aren't hostile unless a Straddler shoots them. You can put Stradpoles in buckets of lava. More on: https://alexs-mobs-bestiary.fandom.com/wiki/Straddler