Need some clever ideas for a class ability that builds on a feat.

[Neodymium]

I am (re)developing a rather sneaky prestige class for use in a friend's game. One of the prerequisites will be the Darkstalker feat from Lords of Madness. I'm trying to come up with a class ability that will expand on that feat. I'd say outright immunity to blindsight, et al, is a little extreme. Although a penalty on the detection roll is a reasonable solution, i was wanting something a little more interesting.

Any ideas?

[SmiloDan]

Neodymium wrote:

I am (re)developing a rather sneaky prestige class for use in a friend's game. One of the prerequisites will be the Darkstalker feat from Lords of Madness. I'm trying to come up with a class ability that will expand on that feat. I'd say outright immunity to blindsight, et al, is a little extreme. Although a penalty on the detection roll is a reasonable solution, i was wanting something a little more interesting.

Any ideas?

Maybe a 10% chance per level of evading blindsight? Maybe with a bonus for standing still (like with cinematic T-Rexes)?

Maybe require a Spot or Listen check vs Hide or Move Silently checks, possibly with a class-based bonus for this?

[Neodymium]

hmm, the 10% chance per level thing got me thinking.
maybe having something that comes into effect even if they make the spot/listen check.
or conversely, something that comes into effect if they fail on the spot/listen.