With the set, red received a whole host of new toys to play with, whether it be through direct damage, the new battle cards, or hasty creatures
Timing permissions based on the cards type are ignored, but other restrictions (such as Cast [this card] only during combat) are not
So for starters he is a decent size being reasonably tough to kill and usable defensively in combat
Secret rare Energy cards are always a treat to pull, and the Lightning type is one of the most spectacular due to how well the gold goes with the yellow color and the extra sparkles in this Sword & Shield era one make it even more glamorous
They may introduce rules text thats never been seen before
And this exert is just an attack trigger, so your creature arrives before blockers are declared