Remember that mod from Hexxit? Neither do I.
This mod is simple, adding a few giant swords in the game, which deal more damage than the game's regular swords, and can block like shields, thanks to code from Fuzs_'s mod "Sword Blocking Combat" (Currently a 1.14.4 feature only)! They're crafted using 6 pieces of the material the player wants (wood, cobble, iron, gold or diamond) instead of the normal 2.
What that means is that the player is able to slain their enemies at a much more quick, less annoying rate.
Very much still a WIP, with custom shields being one of the dreams I have for this mod.