"Dark Magician" + "Flame Swordsman"
You take no Battle Damage from battles involving this card. When this card is destroyed by battle and sent to the Graveyard: Special Summon 1 "Mirage Knight" from your hand or Deck.
Rulings
Individual Card FAQs
The "damage" referred to by "Dark Flare Knight" is Battle Damage.
Netrep Rulings
One “Mirage Knight” may be summoned for each “Dark Flare Knight” destroyed as a result of Battle.
If “Dark Ruler Ha Des” destroys “Dark Flare Knight” as a result of battle, “Dark Flare Knight's” effect of being able to Special Summon “Mirage Knight” will be negated.