"The walkers took Shane..."
my proposition:"diablo walks the earth" all players see a red circle on world map that changes position from time to timethe encounter holds some uber duper deathclaw with 99999 hp doing 100-300 damage a hithe drops deathclaw horn - just nice item to show off, or it can increase some stat by +1 or to +10 when in inventory
let the mega deathclaw be able to heal crippled limbs every so often
Outbreak.
Outbreak....This event could be more about searching and logics , not killing gazilions of NPCs.