Blazing Swordsman

The user of this feat is able to channel arcane damage into their blade, thus amplifying the damage of the blade attacks with 1d8 extra fire damage.

At higher levels, the number of dice increases to 2d8 at 8th level, 3d8 at 12th level, 4d8 at 16th level, and 5d8 at 20th level.

You increase the damage die of the longsword to 1d10 if you are welding it in one hand and 2d8 if you are welding it in two.

You gain double your proficiency bonus to damage rolls.