If the level had been, say, 50 or something, that would have been a lot more understandable, it would have made these cards invaluable in the late game, where you WILL be needing them, but apparently, that would help you too much
Cross Duel and Rush Duel both take a different tack, focusing on different rule sets and player orientation
If you control a Divine-Beast during the End Phase, all of your opponents face-up cards that activated an effect that turn are destroyed
Zera Ritual
Just make sure you make your plays first before plopping this card on the field
When And the Band Played On is activated, neither player can special summon monsters with the same level or rank as monsters they already control