Expedition: general discussions.

A hero killer creature discovers a strange gem which transforms it from its humble original form into a virtual engine of destruction. The gem also imparts an overwhelming desire in the creature: destroy great heroes of the land. It can sense the greatest living legend within hundreds of miles, and it will track this creature resolutely, brooking no interruptions to its destiny. If the hero killer creature encounters a group of adventurers which counts its target as a member, the creature will casually cast aside all obstacles to achieve its overriding goal.

The gem empowering the hero killer hones its abilities to the fullest in pursuit of its goal. As a side effect, the creature gains incredible power when dealing with all “distractions.” For any creature other than its target, the hero killer doubles its armor, deflection, and insight bonuses (effectively tripling the base creature’s bonuses); its DR becomes 5/- (or 10/- for CR 15 or higher creatures); it gains a +8 circumstance bonus to its CMD; and the creature benefits from improved evasion and improved uncanny dodge (as if it were a barbarian or rogue with levels equal to its Hit Dice). Finally, the hero killer gains immunity to any mind-affecting effects, regardless of the source.

Once the creature has attempted to collect its target (see below), it loses all the above benefits until it fixes upon a new target 24 hours later. Additionally, any victim of the hero killer who has returned to life after the creature has attempted to collect it treats the creature as if it didn’t benefit from eyes on the prize.