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.
Ok if anyone is still interested in this post: I tried my luck to get it and burn Neo-Impact down -> with STILL 29 packs left I got my 1st mirror wall (and in glossy) - very happy about this, could have been way worse :)
I know that sucks as hell - had the same in Wonders of Sky 5 SR in the last 12 packs :/
but at least we know what to get at the end; I think thats kind of fair (otherwise in pure random generator there you could buy 500 packs without mirror wall or so^^)
Definitely, this card takes the cake as the best card in duel links atm, since the start, if you have this card (let alone having 3 copies) it's sure win for you. Somehow every opponent has it in their starting hand, how?