Story time:

I had some trouble scheduling the group together, so I ran some one-on-one adventures with each member so they'd still get a chance to roll dice.

So the cleric is cruising around town one night when this man runs out of his house yelling for help. Some horrible goober (later identified as a bodak) snatched his son out of bed and absconded into the spooky cellar. The man can't go far to summon the watch because his invalid father is upstairs and can't be left alone, so isn't it fortuitous that a locally well known adventurer happens to be strolling by?

So the cleric goes down into the basement to get the baddy. The bodak has the boy hostage and has a deadly gaze attack.

My expectation was that the cleric was going to Turn Undead and scare off the monster. The cleric's expectation was that they were going to cast Pillar of Fire and cook that sumbitch.

Pillar of Fire is a cylinder with something like a 20 foot radius and 40 foot height. I ask if he's sure, and he is, so the monster, child, cellar, first, and second floors burst into flames.

Realizing he's toast if he stays here, the cleric leaves the cellar and bumps into the frantic man on the street. He asks if he got the monster and the cleric shrugs.

The man then agonizes over whether he should save his father or his son, and then plunges into the cellar. Moments later, the burning house collapses on itself.

And that's how our cleric wiped three generations of a bloodline off the map with a single spell.