Seven mana seems like a high cost for an ability until you remember some of the amazing dragon synergies like Goldspan Dragon and Savage Ventmaw
With Professor Turos Scenario, simply return that Mew VMAX to your hand and force your opponent to waste an attack
While you wont use these in a lot of games, theyre fun when you do get a chance to use them
Thats 120 damage for one energy, which is already a great ratio, but being able to spread it across several Pokmon is the icing on the cake
I guess when a player casts a card like Wheel of Fortune or Timetwister in Commander, only for you to cast Hullbreacher, deny each player seven cards, then make 21 Treasure tokens, it ends up being one-sided and not very fun
When Dumon lost due to the effect of his own card, Vector rejoiced