While I cant imagine Den Protector seeing more play than it does right now, it is starting to give off that Sylvan Caryatid/Courser of Kruphix vibe
You could substitute Shardbringer for Blood Tribute instead in a deck with enough vampires
Including buyers premiums, the total sale price of the card was actually $224,500
If this card is Normal or Special Summoned: You can Special Summon 1 "Symphonic Warrior" monster from your Deck in face-down Defense Position, except "Symphonic Warrior DJJ", or, if "Symph Amplifire" is in your Field Zone, you can Special Summon 1 "Symphonic Warrior" monster from your Deck instead, except "Symphonic Warrior DJJ", but negate its effects
Where Can You Buy and Sell Misprints
Sword of Fire and Ice (Equip Artifact) Play [c]Sword of Fire and Ice[/c] if you like winning