Here is the full list of all 38 Minion Masters achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Complete 30 Achievements
Use 100 Power Tokens
Craft a Legendary card
Complete 25 Daily Quests
Win a Ranked battle with 8 different Masters
Win a Ranked Battle with less than 100 Health left
Play 5 spells in a row during a Ranked Match and then win
Acquire a collection of 150 cards
Use 20 Resource Tokens
Win 100 Ranked Battles
Use 25 Power Tokens
Complete 10 solo challenges
Complete 10 Daily Quests
Craft a Supreme card
Complete 15 Achievements
Win 50 Ranked Battles
Acquire a collection of 100 cards
Watch a replay
Create 3 decks
Complete 3 Daily Quests
Complete 5 solo challenges
Reach the Silver League
Win against 8 different Masters
Reach the Bronze League
Complete 5 Achievements
Win 10 Ranked Battles
Craft a Rare card
Reach the Stone League
Craft a Common card
Win 3 Ranked Battles
Play a friendly challenge with 3 different friends.
Use 50 Resource Tokens
Use 100 Resource Tokens
Use 250 Power Tokens
Win 500 Ranked Battles
Acquire a collection of 50 cards
Complete 50 Daily Quests
Complete 100 Daily Quests