Puzzles are more fun when they put together a lot of different pieces :) Puzzle Skeleton's a little unlike the other Death Knight cards we've seen in that it's best put in a deck with a variety of runes, instead of those only containing a single type. Could be an interesting archetype!

I'd like to imagine that as you fulfil more of its requirements, some of Puzzle Skeleton's lines get more involved. So if you discover it in another class, you just get some creaky bone noises, but if you're a Death Knight, you'll get to hear another voice in the bark for each unique rune you've got.

PLAY: "Prepare for puzzles!" "And death!" "The puzzle is death!"

ATTACK: (Simultaneously) "WRONG!" "WRONG!" "\*Attempt at making a buzzer noise\*"

DEATH: "The answer..." "Was inside of me..." "All along..."

You'd need to replace battlecry "Has lifesteal if you have a blood rune. Repeat with taunt for frost. Battlcry: and reborn for unholy."?

Reborn seems much weaker than the other two options as it won't retain any other keywords on resummoning

"The arm bone's connected to the... foot... bone?"