The ace of spades (also known as the spadille) is traditionally the highest card in the deck of playing cards, at least in English-speaking countries. The actual value of the card varies from game to game. In legend and folklore, it is also known as the death card.

A hint!  A snippet!  A quip!

“You need to be wary of the clubs, Ace.”  His voice, low and stern, brought her back to the present.  Sargon’s eyes locked with Livv’s and she nodded once more.  “They do not deserve our sympathy.  They must pay for the crimes of their forefathers.  It is the only way to prevent another devastating war.  You understand?”