Here is the full list of all 50 Epic Cards Battle(TCG) achievements.
Watch a live battle between other players
Reach Level 45
Complete a Boss campaign quest
Win 500 battles in global match
Reach Level 40
Reach Level 35
Reach Level 30
Ranked in Ladder TOP 100 and get rewards
Win 250 battles in global match
Reach Level 25
Win 5 battles in hardcore mode
Win a Ladder battle
Win 5 battles in pro mode
Win a global match under condition "Time Out"
Reach Level 20
Win 100 battles in global match
Enhance a card to level 10
Reach Level 15
Complete a campaign quest in Hard difficulty
Possess 50 distinct cards
Reach Level 10
Win 20 battles in global match
Possess 20 distinct cards
Buy any item in shop
Possess 10 distinct cards
Complete a daily mission
Win 5 battles in quick mode
Win a battles in global match
Reach Level 5
Add a friend
Win a battle in campaign
Send a chat message
Achieved 100 stars in campaign
Complete all campaign quests in Hard difficulty
Possess 100 distinct cards
Reach 5% of enhancing rate
Reach 15% of enhancing rate
Reach 30% of enhancing rate
Join a guild
Evolve a card
Complete all lessons in academy
Unlocks 50 arts in gallery
Reach Level 50
Reach Level 55
Reach Level 60
Reach Level 65
Reach Level 70
Craft a new card successfully
Watch a battle replay of your own
Win a global match under condition "Extinction"