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