1. The definition of...

"The idea of time travel is a petty thing, because no matter what you do the universe will always punish you in the end."

He remembered saying that to one of his students when they joked of the concept, it was more out of instinct than anything. He wasn't wrong though, after all the vivid images of seeing your loved ones dying as if on loop had to be punishment.

Maybe the many failures is why he was here, in a ruined city where buildings scrapped the sky. Monsters teeming in air, sea, and land where he was nothing more than an entertaining figure to a God's will.

'Constellation,' he mentally corrected himself, 'Edelgard would hate it here.'

[The Constellation 'Secretive Plotter' wonders of your story]