I had another 4x Spell Queller 3-1 result in the Daily, this time in conjunction with SFM. Those two have a lot of nice synergy. This was the most draw-go deck I've ever played, but it still put on a ton of pressure between the 11 Flash creatures (counting SFM's Batterskull propensities).
I'm agreeing with Storm that this is an alternate WinCon in storm decks. You drop this guy turn 1, alongside a Gitprobe, and a Discard effect, or a ritual tutor, then next turn, you attempt to go off, if they fluster your storm spell your still smacking them for 13+ with a dude to the face.
There are corner cases in which it has some value, like bouncing a Gush, Blightsteel, or your own spell
In what way are those corner cases? You literally just named a hyper common draw spell that gets hurt hard by this, one of the more prominent win conditions in the format, and the most common thing you see in any game of magic, your own spells.
Now in my eyes this is a sideboard card for the sake of versatility, and probably only one in a blue tempo list, but I can EASILY see it being played and that means it merits discussion.
When Natural state was spoiled people said it was trash and would not see play because of Natures claim and then it saw play and I did not hear people apologizing for being wrong. Jace is the example people always go to but we don't need to go to the largest example just to prove a point. A card is vintage playable under a lot of circumstances, I think this will see play for all the reasons people have already laid out.
They are corner cases because like I said before - I'd rather just counter the gush or counter the tinker that brought in blightsteel or swords the blightsteel. Counters and swords are already run in decks. You aren't replacing one of t hose with this card. Bounce card that are run in decks include echoing truth, chain of vapor, repeal and hurkyl's recall. You aren't running unsubstantiate over any of those except maybe chain of vapor. But honestly chain sees little to no play anymore. Hurkyl's and echoing truth are more efficient for the same cost unless you both happen to have blightsteel colossus in play. Then this card is better. That's about all I can think of.
But I guarantee you, people will try this and have success and think this proves them right. What they need to ask themselves is this - was that success because ANY bounce or counter would have worked or was that success because I had this particular card over card X? If its the latter, come back and make the case.