You need to be a ninja, who can speak with designs & express with colours. You should know how to fight with the lethal weapons of design, which include Marquees, Brushes, the Pen & Filters.
Design graphics that are appealing
You should've played around with stuff. We want the keedas. If you don't have the keedas, you're not for us.
If you ask us for a list, well knowing/having the following is a necessity:
While knowing/having any of the following is a super-bonus:
Carrying a perspective to Marketing & Branding
Will be worked out