Torchlight/Arbiter

Lightning Bomb
Effect: Hurl a bomb that splits into electrical bolts on impact.

Dual Wielding
Effect: Improves damage of all weapons when dual-wielding.

Flame Trap
Effect: Hurl a device that burns nearby foes with gouts of flame, devastating low resist enemies.

Charm Spell Mastery
Effect: Increases the level of all charm magic spells. Spells can be found or bough, and fall under the spells tab in your inventory.

Flechette Trap
Effect: Hurl a device that sprays foes with piercing flechettes.

Pet Mastery
Effect: Your affinity for animals increases your pet and minion's power and decreases the pet's town-travel time.

Magic Weapons Expertise
Effect: Mastery of all wands and staves, and reduced requirements for rings and amulets.

Devouring Trap
Effect: Hurl a device that drains the armor of all nearby foes.

Shock Trap
Effect: Hurl a device that shocks nearby foes with bolts of lightning.

Advanced Spellcasting
Effect: Reduces the level requirements of all spells and improves mana recharge rate.