Soul Punch Gone Wrong

One day Nekros and Excalibur were high on space weed. Excalibur was curious what would happen if a warframe soul punch another warframe. So he asked Nekros to soul punch him really hard and immediately regretted his decision. Nekros soul punched Excalibur so hard until the evil within him was completely separated from him. That soul is what all warframe fear now. The Stalker.