effective as of may 11 , 2009 -lrb- the `` effective date '' -rrb- , world of warcraft will be hosted in the european union by blizzard entertainment s.a.s. -lrb- referred to herein as , `` blizzard entertainment '' -rrb- , and/or its licensors , and all use of the world of warcraft proprietary on-line service -lrb- the `` service '' -rrb- is governed by the terms and conditions contained in this terms of use agreement entered into between blizzard entertainment , and yourself , and includes any future revisions implemented according to the procedure described in article xii herein -lrb- hereafter referred to as the `` terms of use '' -rrb- .