I really don't like specific planeswalker hate like this, even though Wizards set the precedent with Despise.

Alternatively, I really like planeswalker hate like this, cognizant that it means something, but in a separate context from the rest of the game. I understand Link's annoyance. It is likely, though, that time will favor my opinion. It's really hard not to jump sharks in a game with 40 (?) designers/developers. If precedents are to be set, it's better to set it the right way, as opposed to the Despise way, where it's treated like any other card type.

Oh, that's right. ( ? ) results in .

I like this one. Hit player? hurt them a fair bit. Hit their walker? Hurt the player a fair bit; both by denial of resources.

So it makes sense from flavour, and mechanically it's "You really want to block this creature. Really."

So it works. Personally, I think it's not enough planeswalker hate ("When ~ deal combat damage, remove all planeswalkers from M:tG" perhaps?) but that's a side issue - the land destruction is usually probably nastier.

I think this is quite clever and sensible; I fear it's actually overcosted. and for "must be blocked" is quite expensive (cf Nemesis Mask), and this isn't even consistently "must be blocked".

Oh, I suppose this doesn't say "combat damage", so it's absolutely terrifying on a pinger, so that makes up for it to some extent. Some equipment are allowed to be (Neko-Te, Basilisk Collar), so that's fine, but perhaps this cost ( / as I write) is a reasonable place to stop.

Is this a wishlist item for someone's Zo-Zu the Punisher deck?

That's an awesome combo. :) This is actually top-down design of a manablade from Agents of Artifice. Jace uses one against Tezzeret.