For Challenge # 094. I wanted to design a card off of Alex's principle: that gorilla sorcercies have that ineffable quality that makes them incapable of being instants by their very nature. So I went with a big boom, then added a line about losing the game. I don't think there's a card that makes players lose or win the game at instant speed (Okay, Door to Nothingness. But you had to cast the artifact at sorcery speed, is what I mean.) I must admit, though, that I'd like to see a fair card that did win out of nowhere at instant speed. Maybe something to do with catching a player in the act of doing something 'evil' or 'illegal'? Don't know.

Yeah, I like this, I agree with the logic.

The closest I can think of to "lose the game at instant speed" is Hidetsugu's Second Rite (or maybe Sudden Shock). That doesn't actually say "lose the game", but most of the time it will be the same as "target player loses the game if they have exactly 10 life".

Heh, yep, that would indeed feel wrong at instant speed. :)