This bugs makes the monsters not hit you, they just stand there.

You need two accounts:
1. As an archer; use a hack, put viper or any of the poison shots in and get a SLOTH.
2. Take it to what ever you will kill and circle the sloth around the spawn. Not necessarily circles but just move it around and don't stop hitting it. Viper is nice because if you stop for a while it still bugs since it still has poison dmg.
3. On the other account use a hack to kill the Bifrost monster.
4. Keep circling on the luring char and there you go.