Fishler is clear on this: If you think you have something valuable, send it to a grading service, and they will grade it and send it back to you in a holder. The major grading services are PSA, which commands the highest resale values, and CGC (Certified Collectibles Group), which can be more cost-effective for bulk submissions
The potential maximum damage the attack can dish out is 300 if all six of your in-play Pokmon are damaged
Though it costs six mana to get out, there are plenty of ways to cheat artifacts into play, so thats not really a problem at all
While each one does it slightly differently, whether its mana cost, what they can target, or their base stats, theyre all similar enough that I think theyre equal in ability
anyways, have fun
This quality advantage is particularly important for PSA grading submissions