Predatory Nightstalker

Target player draws three cards.

Take an extra turn after this one.

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

T, Sacrifice this artifact: Add three mana of any one color.

T: Add G.

T: Add B.

T: Add W.

T: Add R.