What does Nocturne's errata change and what types of effects does it apply to?

Question

Accepted Answer

Ruling: Nocturne's errata now banishes him to resolve rare corner cases in the rules and ensure the game can rollback if needed. This applies to effects that look at or reveal from the top of your deck (like Vision, Stacked Deck, Teemo, Baited Hook), but does not apply to simply drawing cards.

Nuances:

Drawing cards does not trigger the errata interaction
The errata specifically handles effects that look at or reveal from the top of the deck, not just Vision