Regrettably, radiant heat is a thing. Barring exotic mechanisms or flat-out Magical Bullshit, a plasma sword would be very
very unhealthy to actually wield.
There are workarounds for that, though-
- Protective gear - somewhere between 'mirror-finished, well insulated armour' and 'battlefield robot with us hiding inside the torso' should do the trick.
- Use 'em as standoff weapons - as projectiles, give them to expendable mooks, familiars, grief drones,
friends we aren't particularly attached to, whatever.
- Make sure your gem's elsewhere and well protected and use them anyway, be a charred skeleton wielding a weapon human eyes can't look at directly, give zero fucks.
We are promising
to try.