Crush of Tentacles

• WWizards of the Coast2016-01-22
  Official Ruling
  All other nonland permanents will already be in their owners' hands by the time the Octopus token is created. Any triggered abilities or abilities that would have otherwise affected that Octopus won't be around to matter.
• WWizards of the Coast2016-01-22
  Official Ruling
  Casting a spell for its surge cost doesn't change its mana cost or its mana value.
• WWizards of the Coast2016-01-22
  Official Ruling
  The other spell that you or a teammate cast can be one that's resolved, one that was countered, or (for instants with surge) one that's still on the stack.
• WWizards of the Coast2016-01-22
  Official Ruling
  If an instant or sorcery spell cast for its surge cost is copied, the copy is also considered to have had its surge cost paid.
• WWizards of the Coast2016-01-22
  Official Ruling
  For some cards, surge represents only an alternative cost, a discount that applies if you or a teammate has cast another spell this turn. Other cards, like Reckless Bushwhacker, have additional abilities or effects if you paid the surge cost to cast the spell.

Rulings via Scryfall