Each of your opponent's monsters that conducted an attack while this card was face-up on the field has its ATK halved as long as this card remains on the field. During each of your Standby Phases, pay 2000 LP or destroy this card.
The odds with this box are the most unbelievably broken in all history of Yugioh. I only got my 1st Magical Merchant on the freaking <102>th pack I opened. That's right, a goddamn N card, gotten only with goddamn 98 packs left.
And now I have 69 packs left and still no Kaiser Sea Horse OR Double Coston.
I feel ya. Same thing happened to me. I got mirror wall after like 180 packs and then reset the box. I'm now only 50 packs in and I haven't gotten a second one yet. I really don't want the same thing to happen again.