Mummies

• There is a room full of mummies in the Chaos Tunnels. This tunnel network is located below the low-level wilderness and has six entrances. These Level 103 mummies are aggressive creatures. By running around the room, you can get them to all follow you into a corner. Once they are all together, you can use your bursting spell to hit them all at once, multiplying the amount of magic experience you gain.
  
  

Zombie Monkeys

• Zombie monkeys are located In the Ape Atoll dungeon. They range in levels from 82 to 129. They are also aggressive and will swarm around you if you stand in the center of the room, making it easy to continue attacking. They do not drop anything of value, so this is merely done for gaining experience.
  
  

Castle Wars

• Castle Wars is a mini-game within "RuneScape" that can be played with hundreds of players at once. It is essentially a game of "capture the flag." When someone is carrying a flag, they are usually followed by many opposing players. A well-placed ice burst can immobilize up to nine of them at a time and save the flag-bearer.
  
  

Abyss

• The abyssal creatures are found on the way to runecrafting altars. There is a monk in the winderness just north of Edgeville that will teleport you into the abyssal realm. There are three different levels of abyssal creatures, and they are all aggressive. The primary precaution here is that your character will become skulled upon entering the abyss for five minutes. This means that no items will be kept if you die during that time.