The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.

Charcoal Diamond enters the battlefield tapped.
: Add .

Draw a card for each creature you control.

Prevent all damage that would be dealt to you and planeswalkers you control this turn by sources you don't control. If damage from a creature source is prevented this way, Comeuppance deals that much damage to that creature. If damage from a noncreature source is prevented this way, Comeuppance deals that much damage to the source's controller.

: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.

Target player draws three cards. Then that player discards two cards unless they discard a land card.

Draw three cards.

Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.

Flash
If a nontoken creature would enter the battlefield and it wasn't cast, exile it instead.

Coral Atoll enters the battlefield tapped.
When Coral Atoll enters the battlefield, sacrifice it unless you return an untapped Island you control to its owner's hand.
: Add .

Trample
: Until end of turn, target creature you control has base power and toughness 5/5 and gains trample.

Whenever a creature attacks you or a planeswalker you control, it gets +2/+0 until end of turn.
: Target player other than Crown of Doom's owner gains control of it. Activate this ability only during your turn.

Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)
Whenever you tap a Swamp for mana, add an additional .

Crypt of Agadeem enters the battlefield tapped.
: Add .
, : Add for each black creature card in your graveyard.

: Add .
, Sacrifice Crystal Vein: Add .

Return target nonland permanent you don't control to its owner's hand.
Overload (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")

[+2]: Discard up to two cards, then draw that many cards.
[−2]: Sacrifice an artifact. If you do, return target artifact card from your graveyard to the battlefield.
[−10]: You get an emblem with "Whenever an artifact is put into your graveyard from the battlefield, return that card to the battlefield at the beginning of the next end step."
Daretti, Scrap Savant can be your commander.

Indestructible
: Add .

Create X 4/4 white Angel creature tokens with flying.
Cycling (, Discard this card: Draw a card.)
When you cycle Decree of Justice, you may pay . If you do, create X 1/1 white Soldier creature tokens.

Deep-Sea Kraken can't be blocked.
Suspend 9— (Rather than cast this card from your hand, you may pay and exile it with nine time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.)
Whenever an opponent casts a spell, if Deep-Sea Kraken is suspended, remove a time counter from it.