DnDPaladin

Thunderous Stomp attack is a giant attack, not a succubus. i think there is a mistake in your beastiary compendium.

Human Variant race

3

Human variant race doesn't have the ability node. instead it is built into its traits which shouldn't be.

in the races you have a duplicate Orc.

The avatar of death monster has double 0 as a CR. doesn't do much, but thats something to check for. Also wanna say... Monsters are fine, feats are too, items...