Make a Fort save; save DC is Cha based

[heliodorus04]

What the heck does that mean?
If I'm making a Fort save, it's Con-based.

If I'm the caster, the DC is based on whatever my casting stat is (among other things).

Though I'm asking this question based on the Ghoul bite attack, I see it all over the place, and I don't understand the phrase "The save DC is Cha based"

[Lord Foul II]

It's for variant gouls
The DC of the save is based off of the creature's cha so if the variant boosts it's cha the DC goes up too
Say you wanted a half fiendish goul, and you boost the cha, boom harder to resist bite

[Joe loves Rules]

It means the attackers charisma (and HD and various feats/abilities) determines the save required. The target still computes their fort save normally.

[Jeraa]

Saying it is Charisma based means the save DC of the attack or whatever is based on the creatures charisma score.

Monster attack save DCs are 10 + 1/2 hit dice + an ability score. A charisma based ability means it is the monster's Charisma modifier that is added to the save DC.