Outlaw

Outlaws are encountered during the What Lies Below quest. In the quest you are required to kill 5 of them.

They sometimes use the phrase "Stand and deliver!" before dealing damage, implying that they are similar to highwaymen or muggers.

They take only 2 seconds to respawn which makes it the fastest item/monster to respawn, excluding the poisonous spider that inhabits Ape Atoll in the temple, which respawns in nearly a second.

They are one of the few NPCs to use the current weapon looks.

Locations
They are found at the Outlaw camp, east of Edgeville South of the Wilderness wall.

Trivia

 * When the outlaw says "Stand and deliver!" there is a 100% chance that the following attack will hit.

Outlaw