For me, I consider myself to have actually won the game when afterwards somebody compliments my deck by saying its cool, or enjoyed having it in the game
You found yourself playing against someone elses tribal deck and decided you wanted to try it out or you just noticed that you had a lot of Goblins and wondered if a deck made up of just Goblins would work
If you dont want to look too hard for creatures that inherently have haste, this also isnt a problem, as you can simply give all of them haste with cards like Fervor, Concordant Crossroads, Rhythm of the Wild, or Fires of Yavimaya, making construction of a deck revolving around this card or Ogniss inclusion in a similarly aggressive deck quite manageable
If the creature returns to the battlefield attacking, it wasn't declared as an attacking creature that turn
On May 5th, 2017, the Pokmon TCG released the second set of the Sun & Moon era: Guardians Rising