This is a rule specific to ninjutsu
The metagame morphing into this is not too surprising since Treasure Cruise, from a deck design perspective, incentivized people to play either tempo or blue midrange, decks that dont really care about specific cards, and love having something like a one mana draw three to refill their hands (and subsequently, the graveyard again and again)
Robot or human
By focusing your deck around Angel creatures, you can make something that works quite well in the late game due to how powerfully this Angel commander can scale them
Disney fans will enjoy the beautiful illustrations, overarching storyline, and playing with their favorite characters in new and novel ways, while veteran TCG players will also appreciate the thoughtful and unique gameplay mechanics that Ravensburger is known to deliver
Aven Interrupter plots it from the stack