King of Spades. (The Ace of Spades was taken. Death Card FTW!)
Since this thread has already way degenerated from original post and everyone are posting whatever they will, I'll stir the mess a bit by posting this to shame the King of Spades. That's no Death card.
That would be this:

Curious detail - the symbol in the flag (hrealdic rose) is used almost perfectly similar in Finnish military rank insignias. The symbol also is found in flags of the companies of the Reserve Officer School of Finnish Army. Here's an example (Military Police Company's flag):

Other companies of mentioned Reserve Officer School have similar main symbol in their flags, only the small golden/yellow symbol indicating the particular company changes. For example 1.st Company has two rifles crossed instead of the police sword symbol.
