What kind of hammer is this???

I saw this is Dragon Arena. also I saw a player use one of these befor Nightfall came out in a GvG, i think it was a high ranking guild. Im still confused on what kind of hammer this is. I want one :]

Thanks

Rhino's Charge. It's Game of the Year special item.

http://gw.gamewikis.org/wiki/Rhino%27s_Charge

its from the GoTY edition

rhino's charge. korean item or guild wars prophecies 2006 edition item.
u can buy the full set of promotional items in the online store