Amass the Components

Draw three cards, then put a card from your hand on the bottom of your library.

Blaze

Big Score

As an additional cost to cast this spell, discard a card.
Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

Brilliant Plan

Ophidian Eye

Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Catalog

Ancestral Reminiscence

Artificer's Epiphany

Draw two cards. If you control no artifacts, discard a card.

Call to Mind

Return target instant or sorcery card from your graveyard to your hand.

Breakthrough

Draw four cards, then choose X cards in your hand and discard the rest.

Cancel

Mountain

Sword of Once and Future

Equipped creature gets +2/+2 and has protection from blue and from black.
Whenever equipped creature deals combat damage to a player, surveil 2. Then you may cast an instant or sorcery spell with mana value 2 or less from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.
Equip {2}

Island

Boon of the Wish-Giver

Draw four cards.
Cycling {1} ({1}, Discard this card: Draw a card.)

Behold the Multiverse

Scry 2, then draw two cards.
Foretell {1}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Birthday Escape

Banefire

Banefire deals X damage to any target.
If X is 5 or more, this spell can't be countered and the damage can't be prevented.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Cathartic Reunion

As an additional cost to cast this spell, discard two cards.
Draw three cards.

Braingeyser

Careful Consideration

Target player draws four cards, then discards three cards. If you cast this spell during your main phase, instead that player draws four cards, then discards two cards.

Borrowing 100,000 Arrows

Draw a card for each tapped creature target opponent controls.

Curiosity

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Niv-Mizzet, Parun

This spell can't be countered.
Flying
Whenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target.
Whenever a player casts an instant or sorcery spell, you draw a card.