Ghostly Pilferer [Core Set 2021 Prerelease Promos]

Ghostly Pilferer [Core Set 2021 Prerelease Promos]Set: Core Set 2021 Prerelease Promos Type: Creature Spirit Rogue Rarity: Rare Cost: {1}{U} Whenever Ghostly Pilferer becomes untapped, you may pay {2}. If you do, draw a card. Whenever an opponent casts a spell from anywhere other than their hand, draw a card. Discard a card: Ghostly Pilferer can't be blocked this turn.

Set: Shadows over Innistrad Prerelease Promos Type: Creature — Elemental Wolf Rarity: Mythic Cost: {3}{R}{R} Whenever Wolf of Devil's Breach attacks

"The crucible yields what you have forged in your mind

Set: Magic 2014 Type: Instant Rarity: Uncommon Cost: {X}{U} Counter target spell with mana value X

Set: Ice Age Type: Enchantment — Aura Rarity: Uncommon Cost: {B} Enchant creature

Set: Throne of Eldraine Type: Artifact Rarity: Common Cost: {2} {T}: Add one mana of any color in your commander's color identity

Reverse Type: Token Creature — Griffin Flying

Set: Core Set 2019 Prerelease Promos Type: Artifact Rarity: Rare Cost: {2} Whenever you become the target of a spell or ability an opponent controls

Set: Rivals of Ixalan Type: Creature — Phoenix Rarity: Mythic Cost: {2}{R}{R} Flying

I ask why they preserve

Arcane Retriever (When this creature enters the battlefield

Set: Aether Revolt Type: Artifact Creature — Construct Rarity: Rare Cost: {3} Whenever Scrap Trawler or another artifact you control is put into a graveyard from the battlefield

Set: Collectors' Edition Type: Instant Rarity: Common Cost: {X}{U} Counter target spell with mana value X