Full spoiler. Also from this time onward there are pics, rejoice!

Even if you don’t care about this set you should probably still check this out since it’s got a bunch of stealth errata.

Most of the stealth errata this time come from the Toons. Toons can now be Special Summoned from the Graveyard even if you do not control Toon World. You just need it to Summon them from the hand in the first place. The condition to Summon them from that hand has also changed, the 2-Tribute Toons now always need to Tribute 2 monsters, the 1-Tributes always need 1, and Toon Mermaid will never need a Tribute. No more Level Conversion Lab or Cost Down shenanigans, sorry. Finally, a face-down Toon World being destroyed will no longer destroy a Toon monster.

As for specific monsters, Toon Gemini Elf’s hand discard is no longer mandatory. You don’t have to fear those Dark World decks anymore.

Dark Necrofear’s equip effect will only trigger from the Monster Zone now, meaning no more setting it off with an opponent’s CCV while it’s in hand or Deck.

And finally for clarifications, Time Wizard, which had an ancient OCG ruling that said its burn also counted your face-down monsters is no longer true thanks to the text upgrade to match the TCG by mentioning it only counts face-up destroyed monsters.

Blast Sphere’s text isn’t a clarification, because this is how the OCG has always ruled it, but it’s now 100% clear that the destruction effect starts a chain, which is not how the TCG has always ruled it.

It remains to be seen if TCG will incorporate these updates.