A physical trait. Roleplay relating to this trait should correspond with the rules of any stated effects, although specifics on how you roleplay are highly subjective. Examples:
- If you are "slammed" by silver, you might roleplay being hit by a metal object, rather than simply falling down. If your race has an aversion to the material you might cry out in anguish.
- If you're "imbued" by silver, you might roleplay glistening and being radiant, rather than simply saying thanks. Unless of course your race has an aversion to the material in which case you might recoil going "EEEEEEEEEEEEEEEEEEK!"
Many players attempt creative roleplay responses, but all roleplay should still include any required reactions resulting from the associated effect, such as falling down, stopping movement, crying out, stopping attacks, etc.
Abilities that remove "physical" effects would be effective against attacks that include this trait.