×With the decoy? I can do that, if I first let the ice golem put some thin ice next to the seep, but then, the decoy stays there, because I can't put a portal next to the seep's block. So in this case how do I kill the skippers and the flower?

× the seep is killed by something else

× the problem is, how do you kill the thing that kills the seep?

× It's a good thing that plants cannot swim!

×flowers can jump onto walls. It sort of makes sense, given how aggressive and rule-breaking these things are (they even eat puffs and go against arrows), but still, this property goes against the general DROD axiom that land-based enemies can't be on walls, unless they were created there (e.g. tar babies) or the wall was created under them.