Here is the full list of all 29 Spellstone achievements.
Obtain Bounty Rank 5.
Complete the 'Void's Ambush' campaign.
Upgrade cards 30 times.
Complete the 'Karthos, Lair of Chaos' campaign.
Complete the 'Castle on the Rocks' campaign.
Complete 'The City of Luminis' campaign.
Upgrade cards 5 times.
Obtain Bounty Rank 2.
Create a Duo Fusion.
Complete the 'Source of Chaos' campaign.
Complete the 'Chaos Contagion' campaign.
Collect a total of 50 Arcane Dust from Vaporized cards.
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 50 Mastery Stars
Collect a total of 100 Mastery Stars
Collect a total of 200 Mastery Stars
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.