One-Up!

[Dizzi]

I'm an iPhone

[Beguile's Mistress]

I am a 4th generation prototype

[Professor Loki Caprion]

I'm a 4th Generation Lasombra.

[Dizzi]

I;m a dictionary so people will know what a lisombra is

[Professor Loki Caprion]

I'm WikiPedia, where you can far more easily figure out what a Lasombra is:

http://en.wikipedia.org/wiki/Lasombra

[Dizzi]

I'm uncyclopedia

[Starkweather]

I'm a 3rd Generation Ventrue.

Eff yoo, LaSombra.

[Scribbles]

I'm a leather wearing, stake strapped, vampire slayer!   :-)

[Skye]

I am the wooden stake that gave you a splinter, that went unchecked. Leading to gangrene that caused the hand you use to kill vampires to get infected. Causing you to spend your nights applying topical medication only to have the hand amputated in the end. Me...I did that. ;) 

[scrapmask]

I am the topical medication that not only saved their life, I cured the common cold, male pattern baldness, erectile dysfunction, and depression.

Side effects include greasy oily discharge and the semi-controllable ability to teleport.

[Starkweather]

I'm the Plague.

[scrapmask]

Really? Because I'm 1/3 penicillin.

[Dizzi]

I'm 100% penicillin

[scrapmask]

I am the corporate ad campaign set out to slander the medicine Penicillin.

[Dizzi]

I'm the Pepsi Advritising crew

[Andy]

Im a Hologram Projector

[Dizzi]

I'm the powersource

[Andy]

Im the Inventor (god)

[Dizzi]

I'm a worshipper (God would be essentially non0-existant w/o worshippers)

[monkeymana]

i'm a church where you worshippers go and worship a god

[Dizzi]

I'm a supporting wall

[monkeymana]

i'm the arch with you supporting me

[Dizzi]

I am the St. Louis Arch

[monkeymana]

i'm St, Louis' cheese factory

[Dizzi]

I'm money that paid for the factory