The only downside for Zareth is if you want to use its second ability, you have to somehow get it into your hand, which can be done with ninjutsu cards like Prosperous Thief, trading them back and forth from your hand
However, Japan play by their own rules, and this isnt uncommon in other TCGs there.
This triggers multiple times if you swing in with multiple creatures with haste
Im almost afraid to ask what you think I got wrong here, but that is what the comments and Discord are for
Additionally, the Emerald Steel deck relies on Diablo Devoted Herald, Prince John Greediest of All, and Beast Tragic Hero to draw more cards, increasing the resource gap between players
This green-black legendary creature is a costly behemoth, but if you can tame it, you can do some heavy damage