User Feeling-Estimate-267 expands on the idea, suggesting that the player can make a hilarious meme deck like this, made up of " just 1 Pokmon who scales with energy, then 59 energy in the deck, and maybe attach as many energy from your hand to your Pokmon in any way you like' card
Varis defeated Windy with his Synchro Monster, "Borreload Savage Dragon", and Windy weakly called out to Lightning
This can be a barrier for some players who may not have the budget or resources to build a large set
Mostly it has to do with the fact that the Terapagos ex UPC has better promos and more packs
They could have given it no casting cost at all, and it would be almost as prolific and still just as painful
(Players dealt combat damage by that creature also get a poison counter.) Giving an attacking creature flying after it has become blocked will not cause it to become unblocked, even if the blocking creature can't normally block creatures with flying