Apologies for my Newbieness. I don't understand the mechanism by which AM just kills this thing.
For example, if the upped card comes into play and gets AM'd, that's a net decrease of 4HP. 5-4 = 1, meaning it should still be alive, no?
Also, if the unupped card gets AM'd at 0 atk, there should arguably be no change to HP.
I'm sure there's a perfectly good explanation. I'm just missing it. Again, apologies for asking a stupid question question that's probably obvious to everyone else.