Cold, Cold Heart

 is a quest in Fallout: New Vegas.

Quick walkthrough
Talk to Vulpes Inculta in Nipton then walk to Sgt. Kilborn at the Mojave Outpost to "spread the word".

Quest start
If you happen to wander upon the town of Nipton a man will approach you and inform you that he has "won the lottery". If continue to make your way through the rubble, you will find that the Powder gangers who once took thhis town have now suffered the fate of crucifixion. As you move further toward the town center you will notice Caesar's Legion members near the double doors of the town hall. When you approach the highest ranked member Vulpes Inculta comes toward you and engages you in conversation. He tells you that he will not nail you to the cross like the rest of the degenerates. *note if you admire his work you gain Caesar's Legion fame. He wants you to memorize what you've seen in the town, then travel to the Mojave Outpost and let "the Profligates" know "the little sermon" he prepared here. You can continue the conversation but he eventually waves you away to teach what you've learned.

Spread the Word of Legion Atrocities
Once you leave this wretched place you can begin your trek to the Mojave Outpost up the highway, not hard to miss the two very large statues shaking hands. When you arrive search out Sergeant Kilborn. You have one of two options you can either warn him of the Legion's movement in and around Nipton or you can promote the Legion's atrocities, this option gains Legion fame. *note: either option will complete the quest.

You told the NCR about Vulpes attack at Nipton
Quest complete for 150xp.