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WUBRG is the order in numbering Magic the Gathering cards, sorted by colour and is pronounced Woo-burg.

W-White
U-Blue
B-Black
R-Red
G-Green

A.K.A WBKRG
Anything with those 5 colours are called WUBRG
Woah! That rainbow is WUBRG!!! Except for the black.
by Monstritous Zatitious April 14, 2009