When you create a character, you will have a level 1 Agathion.
You can increase your level by hunting monsters and gaining
Dragon egg.
Level 1 dragon recovers 500 HP\CP\MP
+
50 piece
=
Level 2 dragon recovers 1000 HP\CP\MP
+
200 piece
=
Level 3 dragon recovers 1500 HP\CP\MP
+
500 piece
=
Level 4 dragon recovers 2000 HP\CP\MP
+
1000 piece
=
Level 5 dragon recovers 2500 HP\CP\MP