Weapon Bonuses:

Taken from the Strategy page under Weapon Bonuses and Item Infusion:

Weapon Bonuses

Weapon bonuses are available for purchase at Special Merchants and are unlocked by completing God Tasks.

Unlocked with 10 God Points. (Cost: 100,000 Drachmas)
Crystal Mastery - Doubles the effectiveness of stat enchancing crystals.
Brutality - Lowers resistance to your damage type by 5% on each hit.
Plague - Lowers target's maximum health by 10% on each attack.
Accuracy - Lowers damage variance by 50%. (Increases average damage)

Unlocked with 25 God Points (Cost: 250,000 Drachmas)
Shield Spike - Deals 10 damage per level on successful block. (Guardians and Stormcallers Only)
Armor Penetration - Removes armor padding on critical hits.
Glory - Increases team's health by 25% on deathblow.
Intimidation - Increases damage variance for attackers by 50%. (Lowers average damage)
Effect Transfer - Transfers the weapon effect from target on deathblow.

Unlocked with 50 God Points (Cost: 500,000 Drachmas)
Bloodlust - Fills power meter on deathblow.
Quickening - Increases health by 100% on deathblow.
Chaos - Damage type is randomized on each attack.
Revenge - War Aid bonus when a teammate dies. (Limit 1 per turn)

Unlocked with 100 God Points (Cost: 1,000,000 Drachmas)
Class Hunter - 30% extra damage when attacking the selected class.
Armor Hunter - 20% extra damage when attacking enemies wearing the selected armor.

* Truesight - Disables Self Sacrifice when attacking.
* Damage Control - Disables Collateral Damage when attacked.
* Death Harbinger - Disables Prevent Death when attacking.
* Speed Trap - Disables Hamstring when attacked.
* Mental Synergy - Adds an additional 25% damage bonus for every mental attacker on the team. (75% max)
* Physical Synergy - Adds an additional 25% damage bonus for every physical attacker on the team. (75% max)
* Range Synergy - Adds an additional 25% damage bonus for every ranged attacker on the team. (75% max)
* Control Synergy - Adds an additional 25% damage bonus for every control attacker on the team. (75% max)
* Critical Protection - Grants immunity to critical damage when attacked.
* Aid Protection - Grants immunity to aided damage when attacked.
* Poison - Decreases Strength and Wisdom by 10% when an attack inflicts damage.
* Fortify - Increases resistance to aider's damage type by 10% when aided. Example: A Guardian with Fortify will increase the physical resistance of their target with each Guard. (100% max)

Hope this helps.