First of all, I should say that I think Cursed Blast in general is a bit of a broken ability, and I have a feeling Pokemon didnt realize the extent to which it could be mistreated in the meta
In this case, it was primarily used in Food Chain combo decks as a means to generate infinite mana to get in for a kill shot
When picking Partner or Friends Forever Commanders, try and focus on what they do mechanically over what colours they add to your deck's colour identity
When you bring the Sinful Spoils spell and trap cards into the picture, the potential for the deck becomes apparent
The deck has a few cards with mana value five or greater, but its far from a strong subtheme
The mana in the new set is not great, so new Standard decks will have to play many basic lands