Here’s a simple premise: spend time creating elaborate armour/weapons entirely out of cardboard then demolish them in melee combat with other similarly garbed enthusiasts.
There are rules for construction of the costumes, there are none for the war itself.
It’s a competition in creativity.
Weeks of work destroyed in seconds.
…a metaphor for modern life?
Matthew 6: 19-21: “Do not lay up for yourselves treasures on earth, where moth and rust[a] destroy and where thieves break in and steal, but lay up for yourselves treasures in heaven, where neither moth nor rust destroys and where thieves do not break in and steal. For where your treasure is, there your heart will be also.