Duplicate protection and legendary pity between sets

Been playing a fair few runs of the new tavern brawl to earn some cards pre-release, due to irl issues I can’t afford to put money aside for the expansion like usual, and only have like 50 packs worth of gold.

Finished a run 3/3 and got two new packs and one emerald dream pack, haven’t had a legendary in 15 odd packs feels like, and when finally do, it’s a duplicate freaking Nythendra.

Why are we being given packs for an existing set everyone has in a promotional event for new content?

Average legendary is one every 20 packs.

So yeah, not getting one in 15 packs is completely normal…

I assume it’s because Arena is coded to only offer “current” packs, and Ungoro isn’t (yet) a current set.

Correct:

Wins Guaranteed Rewards Random Reward Pool Replacement Reward (If Hero Skin Owned) Crowd’s Favor Bonus
0 1 Into the Emerald Dream Pack*
1 Perils in Paradise Pack - - -
1 1 Into the Emerald Dream Pack
1 Random Reward 50 Gold
1 The Great Dark Beyond Pack - -
2 50-75 Gold
1 Into the Emerald Dream Pack
1 Random Reward 1 Into the Emerald Dream Pack
1 The Great Dark Beyond Pack - -
3 75-100 Gold
1 Into the Emerald Dream Pack
1 Random Reward 1 Into the Emerald Dream Pack
1 The Great Dark Beyond Pack - -
4 120-140 Gold
1 Into the Emerald Dream Pack
1 Random Reward 1 Into the Emerald Dream Pack
1 The Great Dark Beyond Pack - -
5 1 Tavern Ticket
1 Into the Emerald Dream Pack
1 Random Reward 50-75 Gold
1 Into the Emerald Dream Pack - -
6 1 Tavern Ticket
1 Into the Emerald Dream Pack
1 Random Reward 225-250 Gold
1 Into the Emerald Dream Pack - 1000 Gold (5%)
7 2 Tavern Ticket
1 Random Reward 100-125 Gold
1 Into the Emerald Dream Pack - 1000 Gold (6%)
8 2 Tavern Ticket
1 Into the Emerald Dream Pack
1 Random Reward 125-150 Gold
1 Into the Emerald Dream Pack - 1000 Gold (7%)
9 2 Tavern Ticket
1 Random Reward 250-275 Gold
1 Into the Emerald Dream Pack - 1000 Gold (8%)
10 3 Tavern Ticket
1 Into the Emerald Dream Pack
1 Random Reward 150-175 Gold
2 Into the Emerald Dream Packs - 1000 Gold (9%)
11 3 Tavern Ticket
1 Random Reward 375-425 Gold
3 Into the Emerald Dream Packs - 1000 Gold (10%)
12-2 4 Tavern Ticket
1 Random Reward
1 Arena Exclusive - Hero Skin 250-300 Gold
3 Into the Emerald Dream Packs 2 Golden Into the Emerald Dream Packs 1000 Gold (11%)
12-1 4 Tavern Ticket
1 Random Reward
1 Arena Exclusive - Hero Skin 300-325 Gold
3 Into the Emerald Dream Packs 2 Golden Into the Emerald Dream Packs 1000 Gold (12%)
12-0 4 Tavern Ticket
1 Random Reward
1 Arena Exclusive - Hero Skin 325-350 Gold
3 Into the Emerald Dream Packs 2 Golden Into the Emerald Dream Packs 1000 Gold (13%)

** Card Packs will update with every new expansion release, adding in the latest set and rotating previous sets. For example, when the new expansion releases on July 8, rewards that currently list Into the Emerald Dream Packs will become The Lost City of Un’Goro Packs, current The Great Dark Beyond Packs will become Into the Emerald Dream Packs, and so on.*

Well I’m sure glad two people responded with information about a gamemode I never mentioned.

Because that’s the reward structure for the tavern brawl. I’d rather have all new packs, too. But that’s not what they decided to do. The majority of packs you get will be new ones, though.

https://hearthstone.blizzard.com/en-us/news/24217842