To defeat the Dark Lord, make sure your heroes are at least level 65. If your heroes are below level 75 and you have trouble gathering for Pyrostorm, instead use a lot of Razor Spins by Lance and Feet of Fury by Goken. For Felis, keep using the Restoras Spell, even if the Dark Lord has not attacked yet or your heroes are at full health, because the spell takes some time. When the Dark Lord attacks, the spell should be finished by then and you will have your heroes healed immediately after he attacks. Keep doing multiple attacks from Lance and Goken. If you are above level 75, prime up the Lunar Gauge with multiple attacks from Lance and Goken. Keep Felis prepared in case something happens. Keep attacking until you are above 700 Lunar Gauge. If the Dark Lord tries to cast a spell, instead of using regular attacks have Lance do Razor Spin or Goken's Feet of Fury. The Dark Lord will eventually die after repeated sessions of spells. Note: If you are below level 70, things may vary. Make sure Lance is equipped with the Elemental Sword (Fire) before going into battle.