B_A

local function BossAnnounce(event, killer, killed)
    if(killed:IsWorldBoss()) then

        SendWorldMessage("[PVE] |cffFFFFFF|Hplayer:"..killer:GetName().."|h["..killer:GetName().."]|h|r killed ["..killed:GetName().."]")
    end
end

RegisterPlayerEvent(7, BossAnnounce)