Council of Serpents is a manipulative tug-of-war game with hidden objectives. Three noble Houses are vying for power, but you are not one of them... You are a member of the Council of Serpents, and manipulate these Houses to achieve your own ambitions.
You scheme to orchestrate the triumph or collapse of one of these great Houses by manipulating their three attributes; the strength of their army, the amount of gold in their coffers and their popularity with the people. If one of these attributes ever reaches the top of its track, the game is immediately over, and that House triumphs. Whereas if an attribute reaches zero, the game is also immediately over, and that House collapses.
You achieve this by playing Influence cards to cause Conflicts, escalate Conflicts into Wars, prepare for these Wars by playing facedown Intrigue cards, make Peace and orchestrate support from powerful Guilds. After playing an Influence card, you enact the top card of the timetrack, often causing the Houses themselves to act. When the timetrack runs out of cards you collectively build it anew, shaping the plans of the Houses for the turns to come.