Two days ago, I proposed a design for dual forearm-mounted super-heated stabbing blades composed of a Titanium-Coltan alloy and capable of reaching 1,000 °C. These arm-blades were intended to act as secondary regeneration-negating weapons for a robot designed to fight a person with the powers of electrokinesis and Low-Mid regeneration.
A well thought-out response from Blade Wraith outlined that this weapon would have major issues with heat transference. They suggested an alternative which featured the blades containing super-heated plasma (around 8,000°C or 10,000°C) that is vented into a target upon being stabbed, melting their internal organs.
These new blades are made from Adamantine (a stupidly-named fictional alloy many times stronger and lighter than titanium), which can resist temperatures going into the quintuple range. However, there's just one problem: what sort of mechanism would be needed to contain the plasma and inject it into a target's body?