Stream of Consciousness

Instant — Arcane

Target player shuffles up to four target cards from their graveyard into their library.

2018-12-07:
If you target any cards in a graveyard and those cards all become illegal targets, the target player simply shuffles their library.
2018-12-07:
Stream of Consciousness can’t be one of the target cards you shuffle into your library.
2018-12-07:
You choose the target cards; the target player doesn’t. They may offer suggestions.
2018-12-07:
You may target zero cards in any graveyard and have a target player simply shuffle their library.