"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.
There are multiple ways to Special Summon Dark Flare Knight by using Cyber-Stein. One is to use cards that can gain you Life Points like Enchanted Javelin, Solemn Wishes or Aegis of Gaia until you have enough Life Points to pay the cost. Another way is when your Life Points reaches 1000 or below, you can use Tea's Skill Life Cost 0 which lets you to not spend Life Points when activating a card effect. And one more way is by using LP boost β/LP boost γ which adds 1500/2500 Life Points at the beginning of the match, but it reduces your starting hand by 1/2 cards.
Once Summoner of Illusions flips, you can tribute another monster in your field to Special Summon Dark Flare Knight from your Extra Deck. You can use Dimension Gate to prevent it from getting destroyed at your End Phase.
You can switch the attack target of your opponent to Dark Flare Knight by using Call of the Earthbound. When Dark Flare Knight got destroyed by battle and sent to the Graveyard, its effect will activate which lets you Special Summon Mirage Knight from your Hand or Deck.
2 Fusion Materials / Special Summons from your hand / Special Summons from your Deck
Prevents battle damage
I think that the main thing holding this card back from being a good alternate in a dm style dark pally deck is the fact that you need to slot in the mirage knight itself, if the mirage knight was summoned from outside the game, it would be way better imho
It's impossible to summon it from outside the game in real life.
What actually held this card back, are two things:
1. This card is incredibly weak when considering its materials.
2. Mirage Knight itself is a Nomi that lasts on the field for only a turn, not worth it to use despite its complex summoning condition.
It would be convenient if its effect activates while being destroyed by card effects. You have to force your opponent to attack it.
You can use The Dark Hex Sealed and Dark Magician to summon it w/o Polymerization.