Fork

Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy.

Time Walk

Each player discards their hand, then draws seven cards.

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

Search your library for a card, put that card into your hand, then shuffle.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

Each player shuffles their hand and graveyard into their library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)

{T}, Sacrifice Black Lotus: Add three mana of any one color.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.