WaterRabbit
Explorer
This is why I have never liked the "can only be hit with x type of weapons". I prefer creatures to have a DR that must be overcome. The special weapon/attack in question ignores y points of DR.
So for the clay golem. They used to be immune to non-bludgeoning weapons. Say they have a DR of 25. Then a bludgeoning weapon ignores 5 points of DR and an adamantine weapons ignores 20 points of DR. While a little more complicated it also removes silly situations such as two werewolves unable to harm each other.
If they have 5 points of DR overcome by silver, they would still be formidable but difficult to kill. They could then harm each other on average, but it would be a long fight.
Or just have them and the tarrasque considered to be armed with silver/magical weapons. In general I always assume a creature can damage another creature of its type -- which also resolves the problem with the tarrasque.
So for the clay golem. They used to be immune to non-bludgeoning weapons. Say they have a DR of 25. Then a bludgeoning weapon ignores 5 points of DR and an adamantine weapons ignores 20 points of DR. While a little more complicated it also removes silly situations such as two werewolves unable to harm each other.
If they have 5 points of DR overcome by silver, they would still be formidable but difficult to kill. They could then harm each other on average, but it would be a long fight.
Or just have them and the tarrasque considered to be armed with silver/magical weapons. In general I always assume a creature can damage another creature of its type -- which also resolves the problem with the tarrasque.