you will get a legendary you dont have already in your 10 first boosters of every extension
i bought boosters one by one from every extension, so i dont waste gold for knights and got 5 legendaries i didnt have in like 20~ boosters
it might be fixed so you should do it if you want to max your dust gain
works for gadgetzan, whispers, ungoro and classic

source:




it will prob not work if you opened a legendary not long ago for that extension

This post was edited by Troll on Aug 3 2017 01:39pm

What?
This isnt a bug that get fixed, this was in an update: https://eu.battle.net/hearthstone/en/blog/20856395

Just opened 11 classic packs that I had sitting and didn't get a legend

i dont see where they say they are gonna apply this change to the old packs

Even More Legendary!

Beginning with the release of the next expansion, you’re also guaranteed to get a Legendary within your first 10 packs of a new set. The release of a new Hearthstone expansion is a super exciting time, and with this change we hope your pack openings start off on a celebratory note!

Combined, these changes should make the pack opening experience more exciting than ever—especially when you see that flash of gold heralding a Legendary card!



have you opened a legendary in classic packs not so long ago?
i havent opened any packs for like a month and it worked for every type of packs withing the 3-5 first packs of each set

This post was edited by Troll on Aug 3 2017 02:08pm

I didn't even play the game for at least a month lol

thats weird, maybe the guy in the video and me got lucky, i got golden gruul + the beast in my legendary classic pack

well you bought them before the update. Cards in a pack are randomly chosen at purchase

im 99% sure blizzard stated the opposite and told players that stacking packs pre-update would work

Yeah I'm pretty sure I read that too

really? then it was changed on purpose. It used to be at the time of the purchase and blizzard confirmed it