It’s a shame that this game doesn’t add Dartz or any of his subordinates. Granted, these characters are non-canon, and this game only adds those who are canon to the manga.
The anime seal was so broke they had to change it's effect in the real game.. seriously think how broke it was in the anime the back row monsters effects would have been a nightmare any for any opponent.. the seal of orichalcos was a terrifying card in the anime I guess I am thankful that effect wasn't printed because the seal of orichalcos would have been a Stable in every deck with it's anime effect.. and I just couldn't imagine how scary it would it be with pendulum and link summoning..
Your monsters get a 500 ATK boost, but all your special summoned monsters get destroyed, and you can't summon from your extra deck. Plus the seal can't be destroyed once a turn and the opponent can't attack your monster with the lowest attack points. Given the heavy focus on extra deck in modern Yugioh, the seal is straight up trash.