For some, they might be picking the Pokemon they like the most
Read it in two layers: The single most useful habit: separate one-time effects ([On Play]) from repeatable ones ([When Attacking], [Activate: Main])
Going straight from 3 mana to 6 the next turn after you play a land lets you rocket out some terrifying beaters like Hellkite Tyrant and Ancient Copper dragon quite early, and you can run blacks cheap graveyard tutoring like Buried Alive or Entomb to gain easy access to a variety of threats
If you choose to pay the dash cost rather than the mana cost, you're still casting the spell
As PolymorphPolymorph decks have proven to us over time, the biggest and splashiest creatures in the entire game, such as Eldrazi titans, tend to occupy the payoff spots for this strategy
The deserts and treats in this artwork add a cute, happy feeling that perfectly matches the Pokemon, leading to creative brilliance that is enough to launch this IR towards the top of the Paradox Rift greatest hits list