These are the monsters used by Xaviax, normally invisible to those who lack Advent Decks. They serve in dragging their prey into Ventara for Xaviax's research and masterplan to obtain enough DNA samples for a machine to mass-transport the people of Earth to Ventara.

• Dispider
• Terabiter
• Zenobiter
• Zebraskull Iron
• Zebraskull Bronze
• Wild Gigazelles
• Megazelle
• Wildboarder
• Abyss Hammer
• Abyss Lasher
• Bakraken
• Wiskraken
• Dedlimmer
• Psycorogue
• Garudothunder
• Magazelle
• Omegazelle
• Sonora Boomer
• Buzzstinger Hornet
• Brobajell
• Shieldboarder
• Garudostorm
• Garudomirage
• Buzzstinger Wasp
• Buzzstinger Bee
• Buzzstinger Bloom
• Buzzstinger Frost
• Respider