I'd go with the Triceratops Dopant from W. For my Advent Deck I'd pretty much just want Ouja's so I could use the two blank Contract cards to add Invisible and Yesterday. ;)

Actually for a contract beast...I think I'd want *ahem* VIRGO Horrorscope...

Strikevent would be some energy blast

Staffvent in liu of no sword...

Phasevent for teleportation

Finalvent- kick them into the dark nebula! Probably in some spectacular manner involving the angel wings...

^I think you mean Virgo

used a Time Vent card on that last post...*whistles innocently*

I'd go with DENEBU!!! from Den-O.

Sword Vent - Summons the ZeroGasher
Shoot Vent - Fires the Zeronos Nova
Advent - Summons the ZeroLiner
Ride Vent - Summons the Machine ZeroHorn
Final Vent - Changes the ZeroGasher into Bowgun mode, and performs Full Charge
Candy Vent - Summons candy to gain the mercy of my enemies