Hour of Devastation

• WWizards of the Coast2017-07-14
  Official Ruling
  Once Hour of Devastation begins to resolve, no player may take actions until it’s done. Notably, players can’t try to give a creature indestructible again to save it from the damage.
• WWizards of the Coast2017-07-14
  Official Ruling
  Creatures with indestructible that enter the battlefield after Hour of Devastation resolves will still have indestructible.
• WWizards of the Coast2018-01-19
  Official Ruling
  There are many important moments in the story, but the most crucial—called “story spotlights”—are shown on cards. These cards have the Planeswalker symbol in their text box; this symbol has no effect on gameplay. You can read more about these events in the official Magic fiction at http://www.mtgstory.com.

Rulings via Scryfall