The Throne Room

When The Throne Room enters the battlefield and Darth Sidious is on the battlefield: all players get 3 turns, and must Attack if able, while defenders must block if able. After turn 3: all players have their Life cut in half and restarts.
{4}{b}: Create 2 Imperial Guards.
{x}{b}: All players gain X life.
{x}{x}{b/r}: Draw X cards and lose X life.
{3}{b}{r}: For the next 3 turns: Spells cannot be played except Force spells.