Prismatic Ending is an example of a card that takes advantage of your ability to produce five colors of mana
While these are an incredibly useful tool, they evaluate cards in a vacuum (but with decades of combined pro insight), and nothing beats the hands-on experience
Thats good, but it also reads, Whenever you cast a spell, each opponent reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard. Being able to cast any spell and then mill everyone is absurd, and the fact that this can then also kill people if needs be is unparalleled
Greninja and Sylveon can also be used as attackers if needed , so while Giratina ex gathers its four Energy with its Broken-Space Bellow ability, they can take the lead
However, there's more than one way to poison an opponent in the format
When these two combine energies, they can launch formidable attacks against others, boosting them in power, status, and value