The key to this combo is to use Teal Mask Ogerpon ex to set up the board and then finish with Hydrapple ex, whose Syrup Storm attack deals 30 damage for every Grass Energy attached to a player's Pokemon
Shefet Dunes Shefet Dunes gives all your creatures +1/+1 at sorcery speed which is, well, pretty good
The front side is essentially Finale of Devastationa very playable cardwith the random Ikorian downside of not hitting humans but the upside of adding two green mana symbols to the battlefield (which matters in decks like Mono-Green Devotion)
The potential to resolve three game-ending spells like Emergent Ultimatum or Breach the Multiverse in a single turn makes this card an absolute must-play for anyone looking to dominate the late game
The one other piece of trivia about this card is that the card design, name, art, and flavor text were all created by the same person
Take your deck out for a spin with and without this card to see if youre too slow to get any mileage out of it