
There are no purchasable upgrades for the Energy Sword. An additional costume, the Braver Sword, is available in the Anime Pack DLC. The Laser Razor is the only costume for the Energy Sword in the base game.

Once upgraded with side quests, killed enemies drop larger amounts of health, making it a good melee weapon to go berserk and decimate enemies at close range (while bats, who have a greater knockback effect, are better to keep strong enemies away while overkilling weaker ones anyway).


The Energy Sword deals very high damage per hit, on par with fully-upgraded Baseball Bat and Tentacle Bat, and disintegrates killed enemies as well as objects and car parts.
