Am I correct in assuming that how the DC 19 fortitude save was derived in regard to an aboleth's slime & mucus cloud being: the aboleth's CON of 20 minus its 8 HD plus its fort +7 (20-8=12+7=19)?
GawainBS is right, it's almost always Base 10 + half hit dice + ability modifier + misc modifiers.
Listen up maggots, Mr. Popo's 'bout to teach you the pecking order.
It goes you, the dirt, the worms inside of the dirt, Popo's stool, Kami, then Popo.
~Mr. Popo, Dragonball Z Abridged
