Instructions
Find the powerful Secret Commanders and recruit them to your cause. Recruit Nightly by searching through Dabikk and talking to each character you find as Nightly's position is random each time you play. Find Jackal in Grapton using the same method.
Buy as many dragon-based weapons as possible, such as the dragon hunter gun and the dragon hammer, as these are designed to be effective against dragons. Equip dragon armor for your troops to protect them against the dragon's attacks.
Use betrayal moves to lower the dragon's morale. Lower his morale to lower the rest of his stats, including his attack power and damage.
Place your commanders in a row from weakest to strongest. Equip "Lost Cause" items, which are powerful items designed as a "last ditch" attack against enemies. Retreat after using all your commanders to avoid the dragon's retaliatory attack.
Heal your characters, restore their magic and immediately fight the dragon again. He will have gained a small amount of his health. Repeat the process until he is defeated.