The Awful and Dangerous Monster?

[Beastman]

Likewise, the way you make players panic and afraid isn't by having them know that X monster is immune to Y, or has a potentially lethal attack form. The way you make players panic and afraid is by having them NOT know what powers and immunites the monster has. You take players out of their comfort zone when they don't know what the rules are here and you force them to deal with the encounter not at the metagame level but at the in game level.

This. So attach a 1d6 table with special abilities and your GM can roll randomly at the start of an encounter what THAT group of goblin's special abilities are. The problem with your suggesstion is, that many classical monsters aren't classical anymore because to make them scary again, you would have to make a complete overhaul and then your goblin is no longer a goblin anymore. This means, take option 2: be a good GM and describe the actions of your monsters accordingly.

The problem i see is that monsters are just too different frome each other. i don't want my goblins to be suddenly be able to teleport around only because my players are not expecting that. Besides, even if "new monsters" are made scary again mechanics-wise, they will become old after a couple of uses. You can say otherwise, but players are metaplaying and use player knowledge to get the upper hand...

Still please no mini-monster-variations as mentioned in my post above...