Amber's ability can still target Lythian Sledgehammer (fixed in 2.87)

[Zyraquis]

Even the new text says otherwise. How this high profile issue was not fixed and tested is beyond me. But maybe not, given the track record....

[Gondorian]

Hi, yes, you are correct. Amber can still target Lythian Sledgehammer. I'm really sorry about this and I'm as bemused as you as to why I missed it.

For what it's worth, I had tested this with Melt Down to confirm it wasn't targetable. So the nerf is somewhat in place, since abuse of Melt Down (2cc to get 2 cards if you have Lythian Sledgehammer out) can't happen now and that was part of why that wording was chosen.