Aegis is a tier-4 aura released in the third batch of Members Loyalty Programme rewards. It is the first Tier 4 aura, and costs 84,000 Membership Loyalty Points. It is a shield that can block up to 10% damage, based on players' Defence levels. This functions in the same way as armour's damage-soaking stat, however there is no minimum amount of damage needed for this to take effect. The absorption rate is also consistent with the player's level. For example, at 99 Defence, if the player incurs 50 damage, he or she is only hit for 45, and 5 is shown as absorbed. The animation, however, only occasionally activates.
The aura remains activated for 30 minutes or until it has soaked up a certain amount of damage (1000 damage as of 26 January 2013), and has a recharge time of 5 hours. When the aura has absorbed the maximum amount of damage, the message displayed in the chatbox is "Your aegis shield has absorbed all the damage it is able to absorb, and has dissipated."
Aegis was not updated for the Evolution of Combat. The large amount of damage taken from every attack would disable Aegis very quickly. However, as of 13 May 2013, Aegis effects have been boosted. It is currently unknown how much damage it can absorb.