White creates tokens, blue scries, red burns opponents, and green pumps creatures, so no matter what you cast, you gain value
Must be Synchro Summoned
The developers describe the content like this: This Game may contain content not appropriate for all ages, or may not be appropriate for viewing at work: Some Nudity or Sexual Content, Frequent Violence or Gore, General Mature Content 2020 Studio DiceSHUEISHA, TV TOKYO, KONAMI Konami Digital Entertainment
Then, when they enter the battlefield, either each other Creature gets -X/-X until the end of turn, and you lose X life, or you can return up to X Creature cards with a mana value of X or less from your graveyard to the battlefield, and then give them haste until the end of turn
So, my advice, spend big now on a 36 pack of boosters, or spend a lot less in a few months time when prices have settled a bit more