The top cards within the Commander Precon deck are Professor Onyx, Wrenn and Seven, Titania, Natures Force, Arachnogenesis, Whip of Erebos, and Reanimate
Special Summon 2 "Water Dragon" from your hand and/or Deck in Defense Position, ignoring their Summoning conditions
What that means is you play the game with a deck of 60 cards made up of pokemon themselves, energy cards which let the pokemon do their attacks and trainer cards that allow you to twist and bend the rules of the game to make your specific deck work
The card becomes a new object and remains in exile
These decks are currently amongst the best in the format, and there were 4 of them placed in the most recent Modern Super Qualifier showing that it will not be disappearing anytime soon
1 Elsa, Spirit of Winter (Enchanted) - $842.78 Set One, The First Chapter This Elsa has always been hundreds of dollars more expensive than any other card in the game, that you can find more organically, that is