The Foul Wyvern is also featured in a Decamon card (Flying 10).
- Quest#14: The Family Recipe
- Type: Vermin/Flying
- Level: 24
- Health: 496/496
- Special: Foul Breath – Causes badly poisoned-effect, making the target lose 10 health each round until the effect is remedied or the target is knocked out.
- Drops: Wyvern’s Tailblade (WP:12, suitable to barbarians and knights)
- Type: Flying
- Level: 12
- Health: 98/98
- Special: Gust of Terror – Causes 6 damage to all opponents.
- Drops: nothing
- Note: automatically defeated when the Foul Wyvern dies. Uses Gust of Terror for a Free Hit.