En

En (圓) is an advanced application of Ren and Ten. In Ren, aura usually envelops only a small amount of space around the user's body. En is when one extends their Ren so that their aura extends further than normal, then uses Ten at the same time to give shape to the aura, usually a sphere. Someone using En can feel the shape and movement of anything entering their En-covered area.[8] The downside to this is that it is extremely tiring and draining for the nen-user to constantly deploy so much aura. Those who master En are typically able to extend their En to a circle of 50m radius. There are exceptions--Zeno Zoldyck, one of the most powerful assassins alive, is able to extend his En to a radius of 300m.[9] Also, the chimera ant Neferpitou, has an irregularly shaped En and can extend a tendril of it up to two miles away.