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