NCF – Extended list of Neutral creatures.

By the way, I once created a King Wyvern creature. It had the ability to consume corpses. Because of this, the game would crash at the beginning of each turn. The reason was simple: I assigned this ability to the King in the spells section, but I didn't specify it among the creature's abilities, and the game couldn't identify it. I added it to both sections, and the crashes stopped.

Added 1 minute later
The opposite happened. I gave it the ability, but not the spell.