Not at first, but...Yes.They can put the creature part on the battlefieldThat's "it" for what the Lurking Predators does. That is not "it" for what happens.and that's itRiver's Rebuke returns it to their hand (along with everything else) which is why they can now cast it. I didn't say it would be free; I said they now had access to it. They had a lot of lands.which does not help at all against River's rebuke.