Here is the full list of all 29 Spellstone achievements.
Obtain Bounty Rank 5.
Complete the 'Karthos, Lair of Chaos' campaign.
Collect a total of 50 Mastery Stars
Collect a total of 50 Arcane Dust from Vaporized cards.
Complete 'The City of Luminis' campaign.
Complete the 'Castle on the Rocks' campaign.
Upgrade cards 30 times.
Obtain Bounty Rank 2.
Complete the 'Chaos Contagion' campaign.
Complete the 'Source of Chaos' campaign.
Upgrade cards 5 times.
Create a Duo Fusion.
Collect a total of 500 Arcane Dust from Vaporized cards.
Successfully craft a Rare Rune.
Successfully craft 10 Rare Runes.
Successfully craft an Epic Rune.
Successfully craft 10 Epic Runes.
Upgrade cards 100 times.
Obtain Bounty Rank 10.
Create a Quad Fusion.
Collect a total of 100 Mastery Stars
Collect a total of 200 Mastery Stars
Complete the 'Void's Ambush' campaign.
Complete the 'Eater of Rock' campaign.
Complete 'The Void Core' campaign.
Complete the 'Swamp Lands' campaign.
Complete the 'Big Mama' campaign.
Complete the 'Tales from the Swamp' campaign.
Complete the 'Trial by Fire' campaign.