From the time Joshua finished discussing business with him, Frostaxe waited an entire week until he received Joshua's invitation letter.
During this week, Frostaxe has frequented the tavern multiple times to check out on how things were progressing with 'Hearthstone.' But, not only was there not a completed version to be seen anywhere, Joshua even moved the prototype elsewhere.
After playing Hearthstone, Frostaxe felt that all other things became boring. After sitting in the tavern drinking wines of sorrow for multiple days on end, Frostaxe felt as if he was scammed by Joshua.
Those damned human merchants have always been extremely cunning. Frostaxe had experienced being scammed by human merchants many times already. After being scammed, Frostaxe would settle things with his scammers in a very simple manner -- he would break the legs of those scammers with his iron hammer!
[1. For people who don’t play hearthstone. Dusting system allows for players to ‘dust’ their cards in exchange for ¼ their card’s value (depending on rarity) in dust. Then, players can craft new cards they wanted using said dust. Essentially, he made hearthstone an actual TCG.]
[2. Real life Hearthstone is a collectable card game. You can’t trade cards.]