Devoid
{T}: Add {C}{C}.
Whenever you cast a spell from your graveyard, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.

[+2]: Reveal the top card of your library and put that card into your hand. If it's a land card, you gain 3 life. Otherwise, you gain life equal to its mana value.
[–3]: Destroy target nonland permanent, then exile each opponent's graveyard.
[–11]: Restart the game. Then you get an emblem with “{W}{B}: Create a 3/3 white Angel creature token with flying.”

Flying, trample
Lucent Peacekeeper enters the battlefield with two defender counters on it.
{1}{R}{W}: Move a counter from Lucent Peacekeeper to target creature an opponent controls.

Flying, vigilance, trample, lifelink
Spells and abilities your opponents control can't cause you to sacrifice permanents.

When Misfortunes of War enters the battlefield and at the beginning of your upkeep, put a chaos counter on Misfortunes of War, then sacrifice it unless you pay life equal to the number of chaos counters on it.
At the beginning of each opponent's upkeep, they sacrifice a permanent or discard a card for each chaos counter on Misfortunes of War.

{1}: You may cast target creature card from your graveyard this turn.
Whenever you cast your first creature spell each turn, you may pay life equal to its mana value. If you do, copy that spell.

Flash
If a spell or ability an opponent controls would cause that player to draw a card, they exile the top card of their library instead. Until end of turn, they may play that card. After the current turn has ended, you may play that card for as long as it remains exiled, and mana of any type can be spent to cast cast it.

[+1]: Create an Idol token.
[0]: Until your next turn, prevent all damage that would be dealt to Oko, and he becomes a copy of another target nonland permanent, except he's a planeswalker in addition to his other types.
[–2]: Another target nonland permanent loses all abilities and becomes a colorless Eldrazi creature with base power and toughness 3/2.
[–6]: Gain control of target permanent. Any number of permanents you control become copies of that permanent.

Devoid
Propagate 1
{4}{R}{G}: Creatures you control get +X/+X until end of turn, where X is Ophidian Invader's power.

Flying
When Prognostic Angel enters the battlefield, scry 2.
{2}{W}{U}: Choose a card name, then mill a card. If that card has the chosen name, draw two cards.

[+1]: Each player exiles a card from their hand. Cards exiled this way may be cast by their owner until the beginning of that player's next end step.
[–2]: Sigrid, the Hollow Queen deals 3 damage to target creature or planeswalker.
[–6]: Gain control of up to four target permanents. They gain haste until end of turn. Sacrifice them at end of turn.

Flying, vigilance
You may look at an additional card each time you scry.

Devoid
Flying
Whenever you cast a colorless spell, colorless creatures you control get +1/+1 until end of turn.

Devoid
When Vestry Ingester enters the battlefield, create two 0/1 colorless Eldrazi Spawn creature tokens with “Sacrifice this creature: Add {C}.”
Whenever you spend five or more mana to cast a spell, put a +1/+1 counter on each creature you control.

Devoid
Gain control of target permanent with mana value 3 or less. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle their library.

{T}: Add {C}{C}{C}.
{5}, {T}: Draw a card.

When The Chasmal Rift enters the battlefield, search your library for a card with mana value 6 or greater, reveal it, then shuffle and put that card on top.
Spells you cast cost {1} less to cast.
At the beginning of your end step, if you cast a spell this turn, draw a card.

{T}: Add one mana of any color.
{3}, {T}, Sacrifice Courtyard Obelisk: Draw two cards.

Indestructible
[+1]: Draw a card, then you may put a card from your hand onto the battlefield face down as a 2/2 artifact creature.
[–2]: Choose a permanent an opponent controls. That player sacrifices that permanent unless they sacrifice two other permanents.
[–8]: Sacrifice any number of permanents, then put up to that many permanent cards you own from outside the game onto the battlefield.

Defender, reach
{1}, {T}: You gain 1 life.

{T}: Add {C}.

{T}: Add {C}.
{3}, {T}: Add {C} for each Eldrazi you control. Spend this mana only to cast colorless spells.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Whenever you cast a colorless spell, put a brood counter on The Severed Cradle.
{T}: Add {C}.
{2}, {T}: Add an amount of {C} equal to the number of brood counters on The Severed Cradle. Spend this mana only to cast colorless spells.