The quest reward can only be obtained after being out-of-combat for 5 seconds.
Triggering the Spoils of War passive adds +1 to the creep score of the allied champion who receives the bonus gold.
The Spoils of War passive is triggered no matter what method is used to kill the minion, though the execute can only be triggered with melee basic attacks.
The Deadly Phalanx active can be cast on yourself.
The shield changes colors (from blue to yellow) right before it explodes. As an enemy, you can use this visual indication to avoid the explosion.
You can save the four charges and kill four or more minions, and heal nearby allied champions for around (50+20) per charge. This mass heal can help tremendously in a teamfight.
Assuming Timeworn Face of the Mountain's user kills the most valuable minions available, Spoils of War provides:
13.125 per 10 seconds to the user, while also sharing that same gold with the lane partner.
Between 20 and 35 minutes, this is increased to 15.83 per 10.
After 35 minutes, this is futher increased to 22.5 per 10.
Assuming Timeworn Face of the Mountain's user kills one minion every 20 seconds, it provides at least 12.5 health regen per 5 seconds to the user and to the lane partner, not taking into account the missing health ratio.
Stats: +2 per 10 seconds, +450 health, +100% base health regeneration, +10% cooldown reduction.
Unique Passive - Spoils of War: Melee basic attacks execute minions below 340 − 680 (based on level) health. Melee autoattacks that would proc Spoils of War gain 150 bonus range and slightly increased attack speed. Killing a minion by any means heals you and the nearest allied champion for 50 (+ 2% of missing health) health and grants them kill gold. Healing is halved if the owner is ranged. These effects require an allied champion within 1050 units of the user. Recharges every 20 seconds. Max 4 charges.
Unique Passive - Quest: Earn 750 using this item. Reward:Shield Battery, a permanent shield for 255 − 340 (based on level) health. The shield regenerates slowly when out-of-combat. Executing minions with Spoils of War regenerates 64 − 85 (based on level) shield value.
Unique Active: Grant a shield to yourself and an ally equal to 10% of your maximum health for 4 seconds. After 4 seconds, the shield explodes to slow nearby enemies by 40% for 2 seconds (60 second cooldown).