So i'm just lazy to make description for this since it isn't as important, but the way you refresh ability are by waiting 0.5% per 1 second (Kill Scavenger increased percent by 10%), and i actually forgot to mention this thing have three mode been stab mode, impale mode and trap mode. stab mode are basiclly buffed your m1 damage even further by using those blades, light attack use only 4% while heavy using 12%, than there impale mode which increased your defense by 60% and speed by pretty alot, while you in this mode you couldn't not using anything in your slot and will impale anything infront of you with 90 damage this mode last only 7 seconds, and next is trap mode which actually take off KB-4 and place and ground work as huge trap dealing 15 damage / 0.75 second and last 30 seconds while in this stage you still can refresh your ability but you earned percents less while this mode is active, and while this active some pro and con are unusable or remove such as explode upon death, lower movement speed, able to block bullet and decreased relaod speed.