The tournament is played in Standard format , which includes cards from 2020s Sword & Shield set through 2022s Pokmon GO (essentially all cards with D and E regulation marks in the bottom left corner)
(From WOTC) Planechase, also known as Planar Magic, is an official game variant first populated by Planechase (2009) and basically acts as an augmentation to other formats though players can also play decks specifically geared towards this format
In an homage to the original Base Set Charizard, its attack deals terrific damage at the cost of forcing you to discard some energy
For two energy, Celebi can perform Powerful Bloom, dealing 50 damage per each head players flip the number of coins flipped depends on how many energy are attached to Celebi ex
Anyways cards like Twitch, Twiddle or Voltaic Key in combination with Strionic Resonator and any effect that puts more than 1 or 2 counters on something (OR RAMOS) just lets things go out of hand.Pretty nice deck you've got there!
But it has a lot of stats for the mana value, and making creatures unblockable makes achieving max speed easy