[JCP-YGO] Stardust Dragon CVs. Spell Card effect resulting from Diamond Dude

[UDEbot]

from UDE's Judge Certification Program (YGO)

May I negate the effect of a "Lightning Vortex" who is having it's effect activated by the effect of my opponent's "Destiny Hero - Diamond Dude" with the effect of my "Stardust Dragon"?

http://entertainment.upperdeck.com/COMMUNITY/forums/thread/1454576.aspx