Here is the full list of all 25 Buff Knight Advanced achievements.
Collect 20 Artifact
Get the money 10,000,000,000
Kill 10 Dragons
Air Combo 20 times
Solve Fairy's Quiz 15 times
Kill 5 Dragons
Complete Last Stage
Get the money 1,000,000,000
Enchant 100 times
Enchant 50 times
Kill 1 Dragon
Died 100 times
Collect 10 Artifact
Solve Fairy's Quiz 10 times
Enchant 10 times
Kill 1000 Monsters
Clear Stage 1
Kill 500 Monsters
Solve Fairy's Quiz 5 times
Use HP Potion 10 Times with 10% of Full HP
Kill 100 Monsters
Collect 20 Artifact and Upgrade Complete
Complete Last Stage + ?
Air Combo 50 times
Air Combo 70 times