The file was labeled:

The footnote had changed. Now it read: "You spoke the dual. You turned time. You are now a co-author. Welcome to the twenty-first declension. The only way out is to conjugate a verb that doesn't exist yet."

Page 1: Standard declension tables. Dative singulars. Dual forms. Boring.

For the next week, Leo experimented. A plural subjunctive sent him forward a day. An optative dual made his reflection wave without him. But the real terror came when he finally located the metadata embedded in the PDF's code.

Then he noticed the footnote. It wasn't in the original Sivieri-Vivian drafts. It read: "Οὗτος ὁ τύπος οὐ μόνον γραμματικήν, ἀλλὰ χρόνου στροφὴν διδάσκει."