Vigilance

As Anointed Peacekeeper enters the battlefield, look at an opponent's hand, then choose any card name.

Spells your opponents cast with the chosen name cost more to cast.

Activated abilities of sources with the chosen name cost more to activate unless they're mana abilities.

When this Case enters the battlefield, it deals 3 damage to target creature an opponent controls.

To solve — Three or more sources you controlled dealt damage this turn. (If unsolved, solve at the beginning of your end step.)

Solved — Sacrifice this Case: Exile the top three cards of your library. Choose one of them. You may play that card this turn.

If a nontoken creature an opponent controls would die, exile that card with an ice counter on it instead.

You may cast spells from among cards in exile your opponents own with ice counters on them, and you may spend mana from snow sources as though it were mana of any color to cast those spells.

At the beginning of each end step, you may have CARDNAME's base power and toughness each become equal to the greatest number of spells and abilities from different sources that were on the stack simultaneously that turn.

Other creatures have "Whenever this creature attacks, you may have it fight Grothama, All-Devouring."

When Grothama leaves the battlefield, each player draws cards equal to the amount of damage dealt to Grothama this turn by sources they controlled.

When Limited Resources enters the battlefield, each player chooses five lands they control and sacrifices the rest.

Players can't play lands as long as ten or more lands are on the battlefield.

As Phyrexian Revoker enters the battlefield, choose a nonland card name.

Activated abilities of sources with the chosen name can't be activated.

Raiding Party can't be the target of white spells or abilities from white sources.

Sacrifice an Orc: Each player may tap any number of untapped white creatures they control. For each creature tapped this way, that player chooses up to two Plains. Then destroy all Plains that weren't chosen this way by any player.

As Sorcerous Spyglass enters the battlefield, look at an opponent's hand, then choose any card name.

Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Sunken Citadel enters the battlefield tapped. As it enters, choose a color.

: Add one mana of the chosen color.

: Add two mana of the chosen color. Spend this mana only to activate abilities of land sources.

(Transforms from Ojer Axonil, Deepest Might.)

: Add .

, : Transform Temple of Power. Activate only if red sources you controlled dealt 4 or more noncombat damage this turn and only as a sorcery.

Flying

As Voidstone Gargoyle enters the battlefield, choose a nonland card name.

Spells with the chosen name can't be cast.

Activated abilities of sources with the chosen name can't be activated.