(I eventually reconstructed the chain that caused this: "Chewie wants our Fblthp doll, but he can't have it" → "he did the same thing with our Torgal plushie" → "oh, if there's a Torgal MtG card it needs to be called 'Torgal, Fine Hound'!" → "huh, now that the FF set is Standard-legal, I should learn to play Standard" → "when is $LGS playing Standard?" → "oh, it's Casual REL? what does that entail?")