Enchant Weapon - Power Torrent

Permanently enchant a weapon to sometimes increase Intellect by 500 for 12 sec when dealing damage or healing with spells. Requires a level 300 or higher item.

Tools

 * Runed Elementium Rod

Source
The Formula: Enchant Weapon - Power Torrent can be purchased from and, located in each faction's coastal port in Twilight Highlands. They sell the formula for 5 Maelstrom Crystals.