How good do you guys think this is? I can see it being ok in a control deck.
So...this is an interesting card to discuss, and this is probably going to be a rough articulation.
In a vacuum, you shouldn't run this card, but this is purely the product of the way that cubes today are generally designed. However, its a card that has untapped potential, if put in the right framework.
In most cubes now, for a variety of reasons, cards cannot be overly narrow. The above posters have touched upon some of the reasons for why this matters, but there are a few more regarding the actual draft, and player experience. Basically, once a card becomes overly specialized, even if there is a
right place for the card in the cube, you eventually have to worry about it appearing in the
wrong places, and causing all kinds of miserable experiences. Think of it like a jaggedslide on a playgroud: yes, if you use it
exactly right it might be the best slide ever, but if its ever implimented wrongly, or out of place, it can hurt the people on the play ground.
This card is overly narrow: not in a tremendouly offensive sense, but more that if it shows up at the wrong time or wrong place its a dead card. The more active the format, the harder it is to show up in a way where its not going to be a dud. Because it looks fun, this is disappointing for the player.
But lets pretend for a moment, that we were running a format that is
very good at filtering cards, perhaps to the point where it feels very close to every card having cycling attached to it. If we have a lot of these filter affects, than this time problem for certain narrow cards becomes less of an issue: after all, we can just filter it out for a new card, should it show up at a clunky or inopportune time.
Well, this frees things up from a design perspective. Instead of having to childproof everything because we have to assume its going to be eventually misplaced as part of the players' exploratory process, we can instead run a much higher density of normally too narrow cards that do interesting niche things, without the nasty punishing downside.
Now, whether this is an interesting or strong enough niche affect to merit inclusion even in that hypothetical environment is a different topic, but at least thats the framework I think you would have to be working with, to even have the discussion.