Bedazzle

Bedazzle is a spell can be obtained at the Orbmaster's guild in the Clouds, and can then be trained at the Spell Training Hut in Shillatown. Only the guild's members can learn this spell.

It acts as a magic spell that reduces the monsters attack's accuracy. At the maximum effectiveness, it will reduce the number of attacks landed on you by 66.6% (2/3rds).

In order to do that, you must have as low of a life as possible, with a high Wisdom count.