Leeching Fury

When in combat, the blood of your enemies fuels you to keep going, knowing they will likely fall before you do. When dealing damage, you heal half the amount dealt, you heal the full amount dealt when landing a crit, additionally, if you are at max health, you can replenish 1 charge of an ability that you would regain after a short rest, or a charge you would regain after a long rest if you land a crit