Its not nearly as prominent as the difference between 1st Edition/Shadowless and Unlimited, so it is ridiculously niche
If this card is destroyed by battle, or if this card in its owner's control is destroyed by an opponent's card effect: You can Special Summon 1 "Silent Swordsman" monster from your hand or Deck, except "Silent Swordsman", ignoring its Summoning conditions
In Vampire, it comes in handy as his DARK Rank 5, able to satisfy Shadow and Duke constraints
This makes it an invaluable meat shield as it not only has a large enough HP pool to stave off early-game damage but it can deal consistent chip damage to anything that tries to punch through it, softening the opponent's Pokmon up for when you can get your own attacker online
With this, Marwyn is able to encourage victory through Commander damage since you will be playing so many Elves
Special Summon 1 "Destiny HERO" monster from your Deck whose Level is less than or equal to half of that target's Level, but destroy it during the End Phase of this turn