It's fairly aggressive. Moves very slowly. Follows whatever the nearest single prey is. So, if 3 people are 10 meters away and one person is 5 meters away, it will follow Mr. 5-meter until the distance to someone else is shorter. I THINK it hunts by smell? Not sure if it can "see".
Has a tongue attack situation that can be used to pull in enemies. Which is then usually followed by a big ol' dose of acidic mucous.
Aside from that, uses its creepy legs as stabbing implements.
Weakness (aside from just doing a mft of damage) are these pustules on it's back. Blightfathers have 2-3 large bulb…