Because the Mummy's always saying, "I'll be in the crypt tonight."
Eve: I forgot to dirty the towel wet the soap and flood the bathroom.
They have mummy issues.
Link: It's raining Z: No it's not L: *Plays Song of Storms* Z: You're sleeping with Epona tonight
He was trying to save Krypton
Because he has 3 dead parents and Bruce only has 2
He's gonna lure him in to the crypt tonight.
Because he doesn't want to be around the crypt tonight. (you can tell i made that up)