Hearthstone’s Hall of Fame for 2020 was just revealed, and it is an opportunity for all players to earn some free dust! In this post, I will go through exactly what you need to do to get as much free dust as possible.
When cards go to Hall of Fame, they are rotated out of Standard format. They are still part of Wild format, so they can be used in Wild ladder, in some single-player content, and in some Tavern Brawls.
Unlike the regular rotation, players receive compensation for all cards that they own that go to Hall of Fame without disenchanting the cards. You get the amount of dust it would cost to craft as many copies of the cards as you can put in a deck, so for one Legendary and for two copies of everything else.
You get dust based on the highest-value copies you own, so for golden copies first and if you do not have as many golden copies as can be put in a deck, for regular copies thereafter.
If you prefer to watch a video, you can find this guide also on Youtube:
What this means in practice for cards of various rarities:
If you own Leeroy Jenkins and Prophet Velen, you cannot increase your dust gain by crafting more copies, including by upgrading to a golden copy. If you do not own the cards, you should craft them in golden for maximum dust gain.
The same applies to Mountain Giant and Shadowform: if you have two copies of each, you should do nothing, and if you miss any copies, you should craft them in golden.
The same applies again to Mind Control Tech, Auchenai Soulpriest, and Holy Fire: if you have two copies of each, you should do nothing, and if you miss any copies, you should craft them in golden.
The crafting cost of golden commons is higher in comparison, and therefore there is a little extra dust available for crafting Acolyte of Pain and Spellbreaker in golden. This is not very significant though, so you should prioritize higher rarities if you cannot craft everything.
If you have none of the Hall of Fame cards and craft them all in Golden, you will get a net profit of 5600 dust if you disenchant the cards after the rotation.
If you have all the Hall of Fame cards as regular copies, you will get a compensation of 5560 dust and you get to keep the cards. You can make a total of 6940 dust by crafting Golden commons and disenchanting all rotating cards.