Ridiculously Large Weapons (5e)

From the introduction:

Let’s face it, some monsters are big. Like, really, really big. Others can fire spikes from their tails while flying, breathe fire, or lob spells at you when you are too far away to do much but shake a fist at them. And against such monsters, sometimes you want a big weapon. Not just a two-handed weapon, or a pike that’s designed to be used in military formations, but an oversized weapon. And sometimes? Sometimes when your enemies are the kinds of foes that seem ridiculously dangerous, and to oppose them you need a ridiculously oversized weapon.