, Put a page counter on "Book of Big-Brain Memes": Scry 1.
, , Put a page counter on "Book of Big-Brain Memes": Draw a card.
Whenever "Book of Big-Brain Memes" has 4 or more page counters on it, exile it and you gain 4 life.

Draw a card, then draw cards equal to the number of cards named Accumulated Knowledge in all graveyards.

Flying
: Target creature loses flying until end of turn. ( can be paid with one mana from a snow permanent.)

Reveal the top four cards of your library. You may put a creature card from among them onto the battlefield. It gains "At the beginning of your end step, return this creature to its owner's hand." Then put the rest of the cards revealed this way on the bottom of your library in any order.

Defender (This creature can't attack.)
: Prevent the next 1 damage that would be dealt to any target this turn.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Destroy target enchantment.

Target creature an opponent controls deals damage equal to its power to each other creature that player controls, then each of those creatures deals damage equal to its power to that creature.

: Add one mana of any color. Spend this mana only to cast a creature spell.

Threshold — Anurid Barkripper gets +2/+2 as long as seven or more cards are in your graveyard.

Return Attunement to its owner's hand: Draw three cards, then discard four cards.

Enchant creature
, Tap an untapped creature you control: Untap enchanted creature.

: Return target artifact card with converted mana cost 1 or less from your graveyard to your hand.

Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players discard cards and sacrifice creatures the same way.

Target opponent reveals their hand. You draw a card for each Mountain and red card in it.

: Tap target creature.
Whenever you cast a white spell, you may untap Ballynock Trapper.

Choose one —
• Destroy target artifact.
• Put target creature on the bottom of its owner's library.
• Counter target instant spell.

Create two 1/1 white Bird creature tokens with flying.
Flashback—Tap three untapped white creatures you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Kicker (You may pay an additional as you cast this spell.)
When Benalish Emissary enters the battlefield, if it was kicked, destroy target land.

When Brazen Freebooter enters the battlefield, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Enchant creature
Enchanted creature gets +1/+2.
When Brilliant Halo is put into a graveyard from the battlefield, return Brilliant Halo to its owner's hand.