The Revenant imp is the lowest level Revenant in the game. Despite its low level, it is far more dangerous than its combat level suggests. It is more powerful than most players with the same combat level. As it is the weakest revenant, some players kill it due to its low stats and health with the potential to drop items worth millions of coins, although some ignore it because it has the lowest drop rate for all of the items revenants drop.
Like all revenants, they can recover lost health (in intervals of 250), can cure themselves of poison and can react quickly to a player's protection prayers.
Also, the examine for a revenant imp is slightly different from other revenants (excluding hellhound, icefiend, and demon). It's examine says the essence of an imp slain during the god wars, not a ghost slain during the god wars. There is a resemblance between the four, the fact that they are all demonic.
The Forinthry Dungeon is a PVP-enabled area, meaning it is entirely possible for other players to attack you while fighting the revenants in the dungeon. Do not bring equipment that you are not willing to lose. Do note that you can teleport out at any time, as long as you are in the appropriate level of the wilderness.