Some decks can win with this effect without ever having to attack with those Goblin tokens, since enchantments like Impact Tremors and Goblin Bombardment are so effective
Its best use is in decks that care about creature power like a Ghalta, Primal Hunger EDH deck or together with cards like The Great Henge
The next expansion will continue to trend of releasing new Mega Evolution Pokemon EX cards, and a trailer that has been released alongside the announcement shows that Grass-type Teal Mask Ogerpon EX, Psychic-type Mega Gardevoir EX, and Steel-type Mega Mawile EX will be among the cards included in the upcoming expansion
Perhaps that's because, despite the massive damage potential, they're simply too slow to make use of that massive attack
There are multiple nice resources regarding misprints on the web
This means it can be retreated easily when it has sustained significant damage