Giving all creatures haste (even if it helps your opponents) is important in not only aggro decks that want to attack, but combo decks that rely on tapping your creatures
It would be powerful enough just to cheat free creatures into play, but putting them in tapped and attacking makes this a lethal commander that overwhelms the table with just a few combat steps
That being said, this card is more than powerful enough to have had a last impact on Standard
Unfortunately, by buying fake cards, even for your own personal use, you are helping to improve the fake cards and indirectly making it easier for other, less ethical people to sell fakes to unsuspecting players
Unfortunately, new near-mint listings are already slightly beyond this average price, with prices starting at $3.58
If a permanent enters with counters on it, the effect causing the permanent to be given counters may specify which player puts those counters on it