Target creature gets -2/-2 until end of turn. If it’s night, that creature gets -13/-13 until end of turn instead.
"And you were almost finished with that ritual, weren't you, darling? How very rude of me. To make it up to you, I'll send you an invitation to my wedding."
The phrase "if it's night" refers to the day or night designation the game can have. It does not refer to whether or not it's dark outside as you play the game.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.