In 3.5 some monsters could grab only if they hit with BOTH claws/slam attacks. Now in PF I see that they (at least the Hezrou Demon and Shambling Mound) can make the grab attack if they hit with ANY of the claws attacks.
Is this assumed to be a mechanic that applies to all attacks that trigger grab? I am trying to convert the Nycaloth from MM3 and I don't know if it would be a great idea to allow grab with every attack, as it could make 4 of them if it chooses so.
Odd, I don't remember any 3E critter that had to hit with multiple hits to Improved grab. Now Rend did always take more than one hit to kick off.
Now that i think about it, requiring multiple hits sounds like a very good idea to help reduce how often improved Grab was overused.