The Rule of Two

If The Rule of Two is in your opening hand, you may begin the game with it on the battlefield.
At the beginning of your upkeep, if an opponent has more cards in hand than you, they lose 3 life.
As long as you control two Sith creatures, they get +2/+2 and have deathtouch and lifelink.
"Created the Rule of Two, you did."
— Yoda to Bane