Minimum 15 contestents to win the Spk.f.fronttier justice(WORTH 1.34 keys [11.ref].
Every contestent gives 1 ref to the group owner or officer. then every contestent will be randomly picked to win 1 SPECIALIZED KILLSTRAEAK FRESTIVE FRONTTIER JUSTICE!

and the 1 who didn't won to the prize gets 1 scrap (sorry :( )