Nano Crystal - Creates a powerful, yet specialised force field around the engineer. This field will remain dormant until the engineer is attacked by a special attack, such as Burst or Full Auto. When such an attack upon the engineer is made, the field comes instantly to life and fully absorbs the effects of that attack. This shield can absorb 7 special attacks before being rendered useless. The power of the field will automatically be refreshed every 30 seconds.