Basically it allows you to cast Wrath of God with a massive board state, then it returns to the battlefield due to its Persist ability, then you get all of your things back while all of your opponents sob uncontrollably
At the same time, those who own one or more copies of Lapras Ex may not have any Gold Crown rares or multiple ones, so this blurs the line a bit
Shriek of Dread is a Instant card in Magic: the Gathering MTG
Odds are you'll want some sort of Twiddle combo to mill everyone out at once, or you'll want to lean into the second ability with flashback, jump start, and retrace spells to get some sort of draw engine going
As such, the misprinted "shadowless" version is extremely rare
Its effect is to discard two cards from your hand, so you can search your deck for a Pokmon you want and put it into your hand