If you dont, you may put a land card from your hand onto the battlefield. If you can plot a card, cast something from your graveyard, from exile, from someone elses hand or directly from your deck, you can put something of your choice into play from your hand
It's not a per player thing
Giving your team +2/+2 often buffs creatures enough to attack profitably, and its easy to spew artifacts across the board so the trigger deals lots of damage (which you can multiply with Furnace of Rath and Dictate of the Twin Gods), making Sentinel Sarah Lyons look like a powerful aggressive commander
Its positioned as a Jump magazine applicant / Asia-market exclusive style release, making it a clean pickup if you want a guaranteed mini highlight set for bindersor to snag iconic characters in one shot without chasing pulls.
I believe all these decks can win, which is why I believe the One Piece Trading Card Game is in a very good place for the time being