Plasma Disc (3.5e Invocation)

Unlike other ignition plasma disc must be activated as a full-attack action.

You create one 10 ft. wide superheated disc of plasma and swing it infinity and beyond. The disc create a 10 ft wide line but with unlimited length. You make a ranged attack roll against all creatures within the line, dealing an additional 1d6 fire damage per class level and count as vorpal (unlike normal vorpal, creatures with multiples heads are still instantly killed as the disc cut the entire body in half). The disc may make one 90 degree trajectory change as long as it remain within the pyromaniac line of sight, but doing so require an immediate action.

Any unattended object within the plasma disc's line is instantly cut in half (destroyed) ignoring both hit points, damage reduction and hardness. The disc will also travel right through mountains, walls and any other breakable obstacles. If it hit a wall of force or a similar effect it will break it but will dissipate immediately afterward.