Blacker Lotus

{T}: Tear this artifact into pieces. Add four mana of any one color. Remove the pieces from the game.

Animate Spell

Flash
Enchant instant or sorcery spell on the stack
When Animate Spell becomes attached to an instant or sorcery, put that card onto the battlefield under its owner's control. It's a creature in addition to its other types with power and toughness each equal to its converted mana cost.
When Animate Spell leaves the battlefield, enchanted card's owner sacrifices it unless they cast it.

Blurry Beeble

Blurry (This creature can be blocked only if defending player was wearing glasses as it was cast.)
Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card.

Blurry Visionary

When Blurry Visionary enters the battlefield, look at the top two cards of your library and put them back-to-back in the same sleeve with either card in front. They become a modal double-faced card for the rest of the game. Then put that card into your hand. (You can play either face of that double-faced card. Make sure to reset it when the game ends.)

Bag Check

Counter target spell, then ask a person outside the game if that spell looks dangerous to them. If they say yes, draw a card, then discard a card.

Claire D'Loon, Joy Sculptor

When Claire D'Loon, Joy Sculptor enters, for the rest of the game, tokens you own become cards that are still tokens. (They continue to exist after they leave the battlefield.)
{1}{W}{U}, {T}: You may put a token from your graveyard or hand onto the battlefield.

Animate Library

Enchant your library
Enchanted library is an artifact creature on the battlefield with power and toughness each equal to the number of cards in it. It's still a library.
If enchanted library would leave the battlefield, exile this Aura instead.