A Good Thing

Spells and abilities you control can't destroy, exile, target, or cause you to sacrifice A Good Thing.
At the beginning of your upkeep, double your life total. Then, if you have 1,000 or more life, you lose the game.

Sanguine Bond

Whenever you gain life, target opponent loses that much life.

Soul Warden

Whenever another creature enters, you gain 1 life.

Lantern of Undersight

You draw cards from the bottom of your library instead of the top of your library.

Scaled Destruction

Choose one or more —
• Destroy all small creatures.
• Destroy all medium creatures.
• Destroy all large creatures.
(A small creature has total power and toughness 4 or less, medium is 5—8, and large is 9 or more.)

Stack of Paperwork

When Stack of Paperwork enters, draw a card.
Combat damage uses the stack. (Combat damage assignment can be responded to before damage is dealt.)

You're in Command

Choose target creature you own and control. That creature becomes your commander. Any other commanders you have are no longer your commander. (That creature starts with a commander tax of {0}.)