Ancient Sacred Wyvern
Fairy / Synchro / Effect
LIGHT / 
71 LIGHT Tuner + 1 or more non-Tuner monsters
While your LP are higher than your opponent's, this card gains ATK equal to the difference. While your LP are lower than your opponent's, this card loses ATK equal to the difference. When this card is destroyed by battle and sent to the Graveyard: You can pay 1000 LP; Special Summon this card.
2100/2000
CARD ID: 25958491
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| TCG Set | Symbol | Rarity | Low | Avg | Trend | |
|---|---|---|---|---|---|---|
| Ancient Prophecy | ANPR-EN043 | Ultimate Rare | -,--€ | -,--€ | -,--€ | |
| Ancient Prophecy | ANPR-EN043 | Ultra Rare | -,--€ | -,--€ | -,--€ | |
| Legendary Collection 5D's Mega Pack | LC5D-EN239 | Secret Rare | -,--€ | -,--€ | -,--€ |
A wyvern is a kind of dragon that has a serpentine body, hind legs, and wings instead of front legs.
This monster appears in the artwork of Synchro Rivalry.
This card appears to have some sort of relation to Ancient Fairy Dragon and Ancient Pixie Dragon, including similar names, and that Luna uses all three monsters in Yu-Gi-Oh! 5D's Tag Force 4 and/or Yu-Gi-Oh! 5D's Tag Force 6.
This monster appears in the artwork of Synchro Rivalry.
This card appears to have some sort of relation to Ancient Fairy Dragon and Ancient Pixie Dragon, including similar names, and that Luna uses all three monsters in Yu-Gi-Oh! 5D's Tag Force 4 and/or Yu-Gi-Oh! 5D's Tag Force 6.
TCG Rulings
Paying 1000 Life Points is a cost to activate the effect.: Ancient Prophecy -- Card Rulings (version 1.0)
OCG Rulings
Paying 1000 Life Points is a cost to activate the Special Summoning effect of "Ancient Sacred Wyvern".: Synchro Monster > Ancient Sacred Wyvern
The effect of "Ancient Sacred Wyvern" increases or decreases its ATK based on the current difference between your and your opponents' Life Points. The increase or decrease is NOT based solely on your opponent's Life Points. If either player's Life Points changes, then the increase or decrease changes accordingly.: How do you calculate the ATK increase or decrease to "Ancient Sacred Wyvern"?
Example: If you have 2000 Life Points and your opponent has 1000, then "Ancient Sacred Wyvern" gains +1000 ATK. If your opponent's Life Points then increase to 1500, then the ATK increase to "Ancient Sacred Wyvern" becomes +500.